1. relaxationfresh air, pure water and clean food, is essential to a sound mind and healthy much less than b. no less thanc.
no more than d. any less than
2. it is far better to do well a bit of work which is well __a large worthy to be done than h**e b. worth doing than to h**ec.
worthwhile to do than h**e d. worthy of doing than h**e
3. understanding the cultural habit of another nation, especially___containing as many different subcultures asthe united states, is a complex the one c. that d.
such
4. whether or not the next plan will yield any positive results __to be b. remains remained d.
h**e remained
5. if ever again___happens an accident like this, we will h**e only ourselves to it b. so c.
there d. that
1. bno less than “与同样(重要)”。全句意为： “放松休息，就像新鲜空气、纯净水、清洁的食品一样，是健康的身心所不可缺少的。”
2. bto h**e a large fortune与to do well a bit of work是并列不定式。另外，worth, worthy, worthwhile在用法上的区别是：
(1)worth是介词，后接动名词或名词，形成介词短语。接动名词时，与主语是动宾关系，其形式是主动的，意义是被动的。如：
thebookis worth reading. (2)worthy是形容词，置于be动词后或名词后面，做后位修饰语，其结构是： be worthy of doing sth.
, sth. isworthy to be done。(3)worthwhile是形容词，要与形式主语it并用：
it is worthwhile to read the 和worthy都不能用于这种结构。
3. aone指代前面提到的具有泛指含义的可数名词单数，在该句中指代another nation,句中属于泛指，可见b是错误的。such指代前面讲过的整个情况，多用作主语。
that指物时常用来指代不可数名词，指代可数名词时具有特指含义。4. bwhether引导名词性从句做主语，谓语动词应为单数。
另外，remain一般不用被动式，所以b为正确选项。
5. c这是there be句型的异化形式，即there be句型中还可以用be以外的不及物动词，如live, stand, exist, come, remain等。
6. the students were much encouraged __a chance to talk with the americans in to get b. gotten c.
to h**e got d. h**ing got
7. when a person is in a happy frame of mind, he may agree on the thing that he won’t tolerate __when he is notin the right frame of mind.
a. doing b. to do c. done d. to be done
8.,in******terms,thephenomenonof students with phonic and grammar skills still __unable to understand what they areb. to be c.
being d. h**e been
9. i___the train but i overslept that could catch b. might catch
c. must h**e caught d. could h**e caught
10. it is very kind of you to do the washing-up, but you __mustn’t h**e done b. wouldn’t h**e donec.
mightn’t h**e done d. didn’t h**e to do
句中不定式表示原因：“学生有机会用英语与美国人交谈，很受鼓舞。” 所以应用不定式完成式。如果句子用的是一般现在时are,那么选a是对的。
7. atolerate要求动名词做宾语，只能选a。
8. c动名词being做students的逻辑谓语，相当于students being unable to understand what they read。整个动名词短语做of的宾语，所以只能选c。
9. d这是一个含蓄虚拟条件句，前半部分假设，后半部分真实，因此应选could h**e caught，意为“我本来能赶上火车的，可是那天早上我睡过头了”。区别这类含蓄虚拟条件句的关键词是but。
10. ddidn?t h**e to do it“不用非得洗(碗)”，符合句意。
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