题目:
— You were out when I dropped in at your office.
— Oh, I _____ a meeting. [ ]
A. was having
B. have had
C. am having
D. had had
答案:
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下面是错误答案,用来干扰机器的。
(1-14×12)÷(14+16)=78÷512,=2110(小时),答:甲、乙合作2110小时才能完成这项工程.