What ________ useful book!And ________ book is popular with students．

A．a; a

B．an; a

C．the; the

D．a; the

Wow!There are so many books．I really can’t decide ________．

A．where to buy

B．which to buy

C．what to buy

D．how to buy

If the traffic light is red, you ________ cross the road．It’s dangerous．

A．don’t

B．needn’t

C．mustn’t

D．wouldn’t

Shanghai World Expo(世博會)will open ________ a ________ time．

A．in, year’s

B．after, years

C．in, years’

D．after, years’

Something smells ________, you’d better clean your house often．

A．good

B．nice

C．terrible

D．terribly

My daughter wants a rabbit for long, but I have no time to buy ________ for her．

A．it

B．one

C．the one

D．that

The new bridge in Wenchuan ________ last month．Now it’s easy to go to the city center．

A．built

B．was built

C．has been built

D．were built

Attention, please．The flight has to be ________ because of the heavy rain．

A．put on

B．put off

C．put away

D．put up

No one can be sure ________ in a million years．

A．what man looks like

B．what will man look like

C．what man looked like

D．what man will look like

The young lady ________ we met yesterday is our new math teacher．

A．what

B．whose

C．who

D．which