题目内容
Watching children, particularly ________ they don’t know you are doing so, is really a pleasure.
A.as
B.when
C.while
D.since
提示:
since意思不符,while和as一般表示两件事同时发生。
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题目内容
Watching children, particularly ________ they don’t know you are doing so, is really a pleasure.
A.as
B.when
C.while
D.since
since意思不符,while和as一般表示两件事同时发生。
|
|