染色质与染色体的区别:英语选择

1、 He had a speech to prepare ,so he _______ ________the party at an early time.
A、 get away B、get away from C、leave for D、leave from
2、 The mother often tells her son to be a good boy, warning him to ______trouble.
A、hold back from B、 keep out of C、 break away from D、 get rid of
3、 Albert Einstein,________ ______life had once been very hard ,was given the Nobel Prize for physics In 1921.
A 、of whom B、 for whom C、 for whose D 、in whom
4、 The teacher advised Tom to ________ _______before deciding to quit school.
A、 think about B、 think twice C、 think up D、 think over
5、 The dentist had ________ _________patients and he was ______ _______his feet all day.
A、 many ;on B、 a few ;by C、 many ;by D 、only a few ;on
6、 We ________ __________the general theory of relativity_______ _______Albert Einstein.
A 、depend ;on B、 thank; for C、owe; to D、 apologize ;for
这些问题请大虾帮忙解答一下,最好写一下原因,谢谢!感激不尽~