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Your experiment reports must be checked with care before ______.A、handed them in
Your experiment reports must be checked with care before ______.A、handed them in
游客
2025-03-15
17
管理
问题
Your experiment reports must be checked with care before ______.
选项
A、handed them in
B、them handing in
C、being handed in
D、handing them in
答案
C
解析
before后要加动名词且是被动的。
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