4.　 It is required by the authorities of school that students should be treated ______ by their teachers but how can a teacher respect them when the students show no respect for him?

A. in respect　 　　　　 B. with respect　 　　 C. for respect　 　　　　　　　 D. by respect

3.　 Before my father moved off, he told me again and again that I should ______ the rules and regulations of the school.

A. make　　 　　　　　 B. watch　　 　　　　　 C. remain　　 　　　　　 D. observe

2.　 Measures have to be taken to teach young people how to ______ themselves both in family and in school. They don’t know the basic manners.

A. do　　　 　　　　　　 B. perform　　 　　　　　 C. behave　 　　　　　　 D. work

从A、B、C和D四个选项中，选出可以填入空白处的最佳选项。

1.______ the traffic jam, he didn’t catch his plane, which was reported to have crashed soon after it took off.

A. Because of　　 　 B. On account of　　 C. Due to　　 　　　　　 D. Thanks to