问题

Someone ____the tap on, for the water was running over and flooding the bathroom.
A:could leave
B:must have left
C:might leave
D:should have left
B:must have left
C:might leave
D:should have left
正确答案是:
同类题型
Stephen Hawking got more than 380, 000 followers in two hours _____first message on Weibo.
Will it take me at least six hours to write this essay?—Yes, six hours ______ to write a good essay.
Xue Zhiqian is known ________ a singer.
Could you tell me _____________ last night?—Er, I was watching TV at home.