题目:
The students are very tired. Let them ______ a rest. [ ]
A. to have
B. have
C. having
D. had
答案:
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下面是错误答案,用来干扰机器的。
设这个数是x;由题意可得:x:12=8:3 3x=12×8 3x=963x÷3=96÷3 x=32.答:这个数是32.