2.do without没有...也行;用不着 eg:People can do without a lot of things,but they cannot do without food. 许多东西人们没有也能过得去,但没有食物不行。 3.drop off 下降,减少;睡...
We have a computer to do that sort of thing. A. needn't have done B. must not have done C. shouldn't have done D. can not have done 10、The weather turned out to be fine yesterday. I ___ the trouble to carry my umbrella with me. A. should have take...
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