1. If these shoes are too big, ask the clerk to bring you a smaller _D_. ) F3 \4 D0 d) l+ S9 n A suit B set C one D pair 7 y8 x9 v7 `: }# S. f R 2. Many new _A_ will be opened up in the future for those with a university education. . K& Q5 }) G# G1 a7 R$ F* f
A opportunities B necessities C realities D probabilities 6 x) W7 ~: G g2 D2 n# u 3. He must have had an accident, or he _A_ then. / O- H, A! Y5 Y( x" G2 H8 {% i A would have been here B had to be here C should be here D would be here ) u/ S' i6 { t6 D- H$ J2 p
must have + 过去分词 表示对过去行为的肯定推测; 8 S' N9 H4 n1 x" `# F- H
与过去事态相反用:情态动词 + have + 过去分词 来体现虚拟语气; ! x4 n6 h+ u+ z, d3 X must 一定,必须; needn’t, don’t have to 不必; 4 W& Z: Y! f! P# m
4. You _A_ all those calculations! We have a computer to do that sort of thing. ; m# X( h L4 M7 B9 E A needn’t have done B must not have done % k1 `$ c6 W5 ?& l' } C shouldn’t have done D can not have done ! @# k8 R! g1 B
should have + 过去分词 本应该,本应当; shouldn’t have done本不应该,本不应当; # D' P C8 T. \% ]2 c* y 5. It was very kind of you to do the washing-up, but you _D_ it. 3 q3 B8 y0 h1 p# k
A mustn’t have done B wouldn’t have done - L$ n1 t) w$ Y. N! x) g6 V
C mightn’t have done D didn’t have to do