1. The survival of civilization as we know it is _C_ threat.
A within B towards C under D upon
under threat 受到威胁。
2. You will want two trees about ten feet apart, from _D_ to suspend your tent.
A there B them C where D which
介词 + which + 动词不定式(to do sth.) 整体做定语。
本句可改写为:You will want two tress about ten feet apart, to suspend your tent from.
只要见到有介词出现在空格之前,而选项中有which, them, there, where等词则应选which。
3. As I was just getting familiar with this job, I had _C_ to ask my boss.
考试网(www.Examw。com) A many B most C much D more
当many没有修饰任何其他词而单独出现时表示很多人。 much在这里相当于many things。
4. _A_ quite recently, most mothers in Britain did not take paid work outside the home.
A Until B Before C From D Since
until recently 直到最近; not surprisingly 一点也不奇怪。
5. In some countries, _D_ is called “equality” [平等] does not really mean equal rights for all people.
A which B one C that D what
that可以引导主语从句,但只做引导词而不充当任何成分。