That was such an____question that it made me____,not knowing how to answer.
-I went to work on foot yesterday, though it ______ cats and dogs.-You ______ by bus. It was likely to get a cold.
.-How about paying a visit to Mr. Richardson, our former history teacher?-Good idea. I will e-mail him today so he ______ know ______ to expect us.
.-We need a person badly to think up such an idea.-______ the new comer have a try?
To be on the safe side, we should fill up the tank now, because we ______ run out of gas on the way.
-There were already five people in the car, but they managed to take me as well.-It ______ a comfortable journey. A. can’t B. shouldn’t be C. must have been D couldn’t have been