his attitudes towards English study.

A. of which

B. to which

C. that

D. through which

【答案】 C

【解析】【分析】句意：美国之行对他来说很重要，因为是那次旅行改变了他对英语学习的态度。此句是强调句型，故选C。

【点评】考查强调句型，掌握强调句型的结构。

38．It ______ not until she came back ______ Jane realized that she had lost her ID card.

A. is, that

B. was, who

C. was, that

D. is, who

【答案】 C

【解析】【分析】句意：直到到了家，简才发现她的身份证丢了。英语中not和until只能在两种情况下紧挨着出现：①强调句型It is/was not until…that…；②倒装句型Not until…。在其他情况一律用not…until…分析句子结构可知，此处为强调句，又因句子使用了一般现在时和过去完成时可知，此处应使用was。故选C。

【点评】考查强调句及时态，掌握not…until…的强调句式和一般过去时。

39．John's success has nothing to do with good luck. It is years of hard work has made him what he is today.

A. why

B. when

C. which

D. that

【答案】 D

【解析】【分析】句意：他的成功与运气没有关系，是多年的努力造就了他的今天。此句是强调句型，基本结构为：It is+被强调部分+that+其余部分。故选D。

【点评】考查强调句式，掌握其结构“It is+被强调部分+that+其余部分。”

40．It's not until mid-night ______ the baby stopped crying.

A. when

B. that

C. which

D. while

【答案】 B

【解析】【分析】句意：直到半夜，婴儿才停止哭泣。此句式not .....until.....句式的强调句型，即“It is/was not until...that...”，故选B。

【点评】考查强调句型，本题涉及not .....until.....句式的强调句型。

41．It was the training ____________ he had as a teenager _________ made him such a good engineer.

A. that; that

B. what; that

C. that; who

D. that; which

【答案】 A

【解析】【分析】句意：句意：就是他在年轻的时候接受的训练使他成为一个这么好的工