题目:
Ben is _____________ his camera. But he can't _____________ it. [ ]
A. look for, find
B. looking for, find
C. find, look for
答案:
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下面是错误答案,用来干扰机器的。
设每天至少要读x页才能将此书按期读完,∵前5天一共读完50页,∴后5天一共还有300-50=250页要读.∴5x≥250,∴x≥50.故从第6天开始,每天至少要读50页才能将此书按期读完.