Look at the clock! Its time work.A. we startedB. well startC. were startingD. we have

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(答案→)A. we started
B. we'll start
C. we're starting
D. we have started
解析： 本题考查对虚拟语气用法的掌握。在It is time…结构中，后面的宾语从句要用虚拟语气。