情態動詞
31) an englishman who ____not speak italian was once traveling in italy. a) must b) could c) may d) might32) i ____like to make a suggestion. a) could b) would c) must d) might33) i know things are hard with you, but you ____try to get over the difficulties. a) can b) may c) must d) ought34 i can't find the recorder in the room. it ____ by somebody.a) may have been taken away b) may leave c) may take away d) must have taken away35) he ____the 9:20 train because he didn't leave home till 9:25. a) can reach b) could catch c) may not catch d) couldn't have caught36) you____ all those clothes! we have a washing machine to do that sort of thing a) needn't have washed b) shouldn't have washed c) must not have washed d) can not have washed37) john's score on the test is the highest in the class; he____ last night.a) should study b) should have studied c) must have studied d) must have to study38) the room is in a terrible mess; it ____ have been cleaned. (cet-4, 1996,6)a) can't b) shouldn't c) mustn't d) wouldn't 39) nobody knows how people first came to these islands. they ____ from south america on rafts.a) must have sailed b) can sail c) might have sailed d) should have sailed40) mary was not in her bedroom yesterday afternoon. she ____ in her classroom. a) should have been b) must have been c) must be d) should be41) bob said he was going to join our club but he didn't. he ____ have changed his mind.