问题
选择题
I'm sure scientists will a way to solve the problem of sand storm (沙尘暴). [ ]
A．set off
B．catch up with
C．begin with
D．come up with
答案
答案：D
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I'm sure scientists will a way to solve the problem of sand storm (沙尘暴). [ ]
A．set off
B．catch up with
C．begin with
D．come up with
答案：D