单选题我们必须仔细使用每件工具并且用完后归还。（）AWe must use all kinds of tools carefully and return it after using.BWe must use every tool carefully and return it after using.CA+BDWe must use everything carefully and keep it after using.
单选题
我们必须仔细使用每件工具并且用完后归还。（）
A
We must use all kinds of tools carefully and return it after using.
B
We must use every tool carefully and return it after using.
C
A+B
D
We must use everything carefully and keep it after using.
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