________ trees must be planted every year．


  1. A.
    Thousands of
  2. B.
    Thousand of
  3. C.
    Thousands
  4. D.
    Thousand
A
解析：
表示一個具體數(shù)字時，thousand一詞不加s，也不與of連用，首先排除B和D．表示一個不確定的數(shù)字時，thousand后要加s，也要與介詞of連用，意思是“數(shù)千的”，故選A．
練習冊系列答案
相關習題

科目：初中英語 來源：2013屆遼寧省建平縣九年級上學期期中考試英語試卷（帶解析） 題型：閱讀理解


In 1620,about half the USA was covered by forests .Today the forests have almost gone .A lot of good land has gone with them ,leaving only sand .China doesn’t want to copy the USA’s example.We’re planting more and more tress .We’ve built the “Great Green Wall ”of tress across northern pat of our country .The “Great Green Wall”is 7,000 kilometers long ,and between 400 and 1,700 kilometers wide .It will stop the wind from blowing the earth away .It will stop the sand from moving towards the rich farmland in the south .More “Great Green Wall ”are needed .Trees must be grown all over the world. “Great Green Wall ”will make the world better .
根據(jù)短文內容，選擇正確答案。
【小題1】In 1620 ,about_____ the USA was covered by forests

A．a(chǎn) thirdB．halfC．to thirdsD．a(chǎn) fourth
【小題2】 A lot of good land has gone with _____.
A．sand B．waterC．windD．forests
【小題3】 The “Great Green Wall”In China is _____long
A．7,000 kilometersB．1,700 kilometers
C．7,000 metersD．400 kilometers
【小題4】 Trees must be grown in _____.
A．ChinaB．the USA
C．some countriesD．every part of the world
【小題5】_____ will make the world better .
A．the Great WallB．Tall buildings
C．Great Green WallD．Flowers and glass

查看答案和解析>>

科目：初中英語 來源：2012-2013學年浙江省九年級上學期第二次月考英語試卷（解析版） 題型：單項填空

These young trees must ______.

A. look after well          B. be look after well 

C. be looked well  　      D. be looked after well

 

查看答案和解析>>

科目：初中英語 來源：2011-2012學年浙江省杭州市中考模擬英語試卷 題型：單項填空

1These young trees must        .

A. look after well                   B. be well looked after

C. take good care of                 D. be taken good care

 

查看答案和解析>>

科目：初中英語 來源：2011年北京市密云縣中考英語一模試卷 題型：閱讀理解

Farmer Ed Rawlings smiles as he looks at his orange trees. The young oranges are growing well in Florida’s weather. Warm sunshine and gentle rains, along with Ed Rawlings’ expert care, will produce a good crop（收成）of oranges this year.

However, Ed has to guard against Florida’s changeable winter weather. In January and February, temperatures can destroy Ed’s entire orange crop. Having farmed in Florida for the past 35 years, Ed is prepared for the frost(霜). When temperatures drop below freezing, Ed tries to save his crop by watering his orange trees. The water freezes and forms a thin layer(層) of ice around the trees. Strange as it may sound, this thin layer of ice actually keeps the fruit warm.

What happens is simple. When the trees are watered, the water loses heat and becomes ice. The warmth of the heat it loses is taken in by the fruit and keeps its temperature at a safe level. Ed has effectively used this method to save many orange crops.

But Ed still faces difficulties. The trees must be watered at the exact moment the temperature drops to the freezing point. Also, just the right quantity(數(shù)量)of water must be used. Too much water can form a thicker layer of ice that will break the tree’s branches(樹枝). Another difficulty is that wind blows away the heat, so Ed has to worry about not only when but also how often his trees should be watered, and how much water should be used.

Computer technology may help Ed with some of these worries. With equipment(設備), air and soil temperatures and wind speed can be measured. The information is fed into a computer which can calculate(計算) when the temperature will drop below freezing. The computer can correctly decide the quantity of water to be used and how frequently(  ) the trees should be watered. Ed finds looking after his orange trees a lot easier with the help of a computer, and, his customers will have the benefits(利益) of computer—age oranges. 

1.The passage is mainly about______.

A. a farmer expert cares for his orange trees

B. the different uses of computers

C. growing oranges in Florida’s changeable weather

D. different ways of frost protection

2.Ed tries to protect his crop by______.

    A. using a wind machine to drive away the cold air

    B. equipping his orange trees with a computer

    C. watering it at the proper time

    D. picking his fruit at the first sign of frost

3. According to the passage, the computer technology______.

    A. removes the need for frost protection

    B. prevents temperature from dropping

    C. tells farmers why outdoor temperatures change

    D. helps the farmer get a better harvest

 

查看答案和解析>>

同步練習冊答案