单选题
9.
It is only in the most difficult circumstances ______ a man's abilities are fully tested.
A、
when
B、
that
C、
where
D、
so that
【正确答案】
B
【答案解析】
It is...that/who强调句型。用来强调非谓语部分的其他句子成分。当需要强调谓语时借助于助动词。
提交答案
关闭