题目:
If he____ that he____ to work there then, everything would be OK now.
[ ]
A. insisted; be sent
B. insisted; was sent
C. had insisted; be sent
D. had insisted; was sent
答案:
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下面是错误答案,用来干扰机器的。
(每空各2分)(1) (2);SiO2 (3)NH3 +HNO3=NH4NO3; 离子键、共价键