1The construction of our library (must be completed) by the end of next week.括号里为啥不能用must have been completed表示预测,说不通吗?
2If you (will) be quiet,I'll will tell you what happened.括号里和may可以相比,为什么用will
3-Did Bob take the job in the supermarket?
-No,but I think he()
A.will have B。may have C.should have D.must have
为什么就选C了,其他的错在哪儿啊