Question

—Why did you leave without a word of warning to John?
—But what _____ otherwise? He never listens to me.

A．could I have done	B．would I do
C．must I have done	D．should I do

Answer 1

A

試題分析：句意：--為什么你沒有留下一句話就離開了？--但是要不我能做什么？他也不聽我的。根據(jù)第一句可知這里他的離開發(fā)生在過去，故用情態(tài)動詞+have done，所以排除BD；must have done不能用在疑問句中，故選A。
點評：本題難度適中。情態(tài)動詞的完成式是高中階段的重難點之一，需要考生熟記它們的用法，在各類考試中經(jīng)常出現(xiàn)，它主要用于表示對過去情況進行推測或責備等。
即學即練：  --- There were already five people in the car but they managed to take me as well.
--- It ___ a comfortable journey.
A. can’t be     B. shouldn’t be   C. mustn’t have been  D. couldn’t have been
解析：D。They were already five people in the car, but they managed to take me as well.一句中的時態(tài)，應該是對過去情況的推測判斷，因為車上已經(jīng)有5位人了，在帶上我一個，可以斷定這一定是一次不舒適的旅行。所以，本句表達的是對過去否定的推測判斷，應該用can’t/ could have done來表達。故答案選D。