问题补充:
25. – we take a rest? I can’t go any further.
– You be tired — we’ve only walked for 20 minutes!
A. May; mustn’t
B. Shall; can’t
C. Can; may not
D. Should; wouldn’t
答案:
A. May; mustn’t
(答案→)B. Shall; can’t
C. Can; may not
D. Should; wouldn’t
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