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11．Do you know when basketball     ？（　　）
A．is inventedB．was inventedC．has inventedD．had invented

分析 你知道籃球是什么時候發(fā)明的嗎？

解答 答案：B．
首先根據語境推測句意是"你知道籃球是什么時候發(fā)明的嗎？"，由于句子表述的是發(fā)生在過去的事情，判斷句子中的謂語動詞用一般過去時，主語  basketball 是動作invent 的承受者，所以用被動語態(tài)，一般過去時被動語態(tài)的構成是：主語+was/were+動詞的過去分詞，故選B．

點評 本題考查時態(tài)和語態(tài)．每個時態(tài)都有標志詞，熟記這些標志詞是做題的關鍵．在沒有時間狀語的情況下可以根據語境來對時態(tài)做出判斷．判斷語態(tài)的關鍵則是觀察主語是謂語動詞的執(zhí)行者還是承受者．

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