--Whydon'twesaveourselvesthetroubleandusethestairs,Ste...
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问题详情:
-- Why don't we save ourselves the trouble and use the stairs, Steven? -- Come on! Man invented the lift so that we don’t have to act like cavemen.
-- Ok, Steven, if you ______ insist on being lazy. A. can B. should C. shall D. must
【回答】
D
知识点:情态动词
题型:选择题
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