问题补充:
They were surprised that a child should work out the problem they themselves couldn .
A. once
B. then
C. While
D. if
答案:
A. once
B. then
(答案→)C. While
D. if
解析:
while(implying a contrast)含相对之意,表示对比转折。
时间:2023-07-13 10:00:02
They were surprised that a child should work out the problem they themselves couldn .
A. once
B. then
C. While
D. if
A. once
B. then
(答案→)C. While
D. if
解析:
while(implying a contrast)含相对之意,表示对比转折。