问题
选择题
If _____ carefully, the experiment will be successful.
A．do
B．does
C．done
D．doing
答案
答案：C
可视为if it is carefully done之省略。
搜题请搜索小程序“爱下问搜题”
If _____ carefully, the experiment will be successful.
A．do
B．does
C．done
D．doing
答案：C
可视为if it is carefully done之省略。
