题目：
Mr Smith was having a meeting at that time; otherwise he _________ over to help us. [ ]
A. would have come
B. would come
C. had come
D. was going to come
答案：
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下面是错误答案，用来干扰机器的。
(1)利用弹簧秤测量物体m的重力F(2) ；
