题目内容

Passengers complain that the subways are usually well behind schedule ______ there is inclement weather.

A. in case
B. when
C. in order that
D. which

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Mr. Scott has been asked to bring ______ copies of the employment contract for the performance evaluation meeting tomorrow.

A. he
B. his
C. him
D. himself

Regrettably, ______ who don"t have valid identification cards are not allowed to enter the company head office for security reasons.

A. that
B. those
C. this
D. these

红外线是太阳光线中众多不可见光线的一种，由德国科学家霍胥尔于1800年发现。它之所以不能被人看到是因为______。

A. 超出了可见光谱范畴
B. 低于视觉刺激阈限
C. 不能刺激锥体细胞
D. 不能刺激棒体细胞

First Royal Bank sent a letter to its customers ______ the revised credit card policy.

A. concern
B. concerns
C. concerned
D. concerning