______, I suppose, and the housing problems for the low-income families could be solved.
| A．If you double your efforts | B．To make some more efforts |
| C．Some more efforts | D．Making greater efforts |
You can’t imagine that a well –behaved gentleman ______ be so rude to a lady.
| A．might | B．need | C．should | D．would |
— Write to me when you get home.
— __________.
| A．I must | B．I should | C．I will | D．I can |
I was really anxious about you. You _______ home without a word.
| A．mustn’t leave | B．shouldn’t have left | C．couldn’t have left | D．needn’t leave |
—I don’t think you should use the dictionary while reading newspapers.
—_____, but I can’t do without it.
| A．No, I should | B．Yes, I shouldn’t |
| C．No, I shouldn’t | D．Yes, I should |
—___John come here tonight?
—I’m not sure, but he ______ stay at home.
| A．May, might | B．Can, must | C．Must, might | D．Can, migh |