They put up their hands to answer the question ________________.
A.at times
B.at the time
C.at the same time
D.all the time
对258人提供帮助
“同时”用at the same time表示。
They put up their hands to answer the question ________________.
A.at times
B.at the time
C.at the same time
D.all the time
对258人提供帮助
“同时”用at the same time表示。