问题
Let’s go out for a walk.—You’d better not. These days the air is getting much ________ than it was before.
A:better
B:worse
C:cleaner
D:easier;
B:worse
C:cleaner
D:easier;
正确答案是：
同类题型
Ann is in hospital.—- Oh, really? I ______ knowI ______ go and visit her
Never before in greater need of technical experts than it is today
Could you tell me something about that boy-Sorry, I don’t know anything about him. Weare ______.
Part of the family are out on holidayThey are supposed to be back ______ this week[ ]