1.c 固定用法： on the average 平均, 按平均数计算; 一般地说
2.C.虚拟语气的用法，根据主语可以此题与过去事实相反，if引起的从句用过去完成时，主语就用would have+动词的过去式。因此可以排除a,b,d 这题是个特殊用法，即，如果条件从句中有were had 等时，可以把if 省略，将这些词放在主语的前面。
3.d,take advantage of 是个固定搭配，表示利用的意思，句子翻译为我愿意利用这次机会来感谢你的友善和好客。
1.Being somewhat short-sighted, she had the habit of ___ at people.
b、 peering (因为有点近视,她习惯眯着眼睛看人)
2 If I hadn’t stood under the ladder to catch you when you fell, you ___ now.
b、 wouldn't be smiling (now是现在,couldn't是过去)
3 I’d rather you ___ those important documents with you.
d、not take
4 The way we picture ourselves is often the way we turn ___.
b、 out ( Turn out to be sb/sth意思是证明是某人[某事物],to be可以被省略)
5 The flying object was finally ___ as being a satellite.
c、 identified
6 The bridge began to ___ under the heavy snow.
d、 give (支撑不住)
7 Since the matter was extremely ___, we dealt with it immediately.
c、 urgent
8 In a time of social reform, people’s state of mind tends to keep ___ with the rapid changes of society.
b、 pace (keep pace with与……同步)
9 A person’s calorie requirements vary ___ his life.
c、 throughout
10 I can’t ___ what has happened to the vegetables, for they were freshly picked this morning.
a、figure out
11 Your nerve system can’t ___ between the imagine experience and a real one.
c、 tell the difference
12 The President called ___ the state of emergency.
b、off (call off 取消)
13 The little girl ___ all over with cold, standing int the street.
a、shivered
14 These two areas are similar ___ they both have a high rainfall during this season.
b、in that
15 Harry was ___ by a bee when he was collecting the honey.
d、 stung
16 Attitudes ___ daydreaming are changing greatly.
d、 against (针对)
17 If this kind of fish becomes ___, future generations may never taste it at all.
a、scarce
18 He will surely finish the job on time ___ he’s left to do it his own way.
d、 so long as (只要)
19 ___ she never got my letter at all.
b、 Surprisingly
20 Our chances of winning the game are ___.
a、slim
很抱歉答案不完全正确
更改答案
1.a. glancing
3.b. didn't take
16. b. for
其他想不出来还有那里可能出错
