16．The reporter said that the UFO           from the east to the west when he saw it．（　�。�
A．was travellingB．travelled
C．had been travellingD．was to travel

分析 記者報道說，當(dāng)他看見UFO的時候，它正在由東向西飛行．

解答 答案A．
B項"一般過去時"表示發(fā)生在過去的動作；C項"過去完成進行時"表示持續(xù)到過去某時的一個動作；D項"過去將來時"表示從過去某時看來將要發(fā)生的動作或存在狀態(tài)；A項"過去進行時"表示在過去某一時刻或某一段時間內(nèi)發(fā)生的動作；根據(jù)題干中的"when he saw it"可知，在過去的某個時刻，即"我看見的時候"，所發(fā)生的事情，在那個時刻UFO正在由東向西飛行，所以應(yīng)該用過去進行時，故選A．

點評 本題考查時態(tài)辨析．解答此類題目首先要讀懂句意，捕捉信息，理解情境，綜合運用，靈活答題，結(jié)合具體的語境，選出正確的時態(tài)．在平時學(xué)習(xí)的過程中，對每一種時態(tài)的用法要掌握到位．

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