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外语
______be careful in making such experimentings.
______be careful in making such experimentings.
admin
2013-12-08
69
问题
______be careful in making such experimentings.
选项
A、Do
B、Does
C、Did
D、Will
答案
A
解析
本题考查动词do的一个用法。本句句意为“在做这些实验的时候一定要小心”。“do+动词原形”用来强调该动词，表示“一定要”。所以答案为A)。
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成人本科学位英语
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