__________ is known to all , Peking University is one of the most famous universities in China.
A. It
B. As
C. What
D. That
解析：参考解析: as作关系代词引导定语从句时，常位于句首意为"正如...这一点”，且常和动词know/show等连用用以指代整个主句所表达的内容;另外,，当先行词被the same或such等词修饰时，也要用as来引导。it和what不能作关系代词引导定语从句，that不能引导非限制性定语从句，故选B。
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He was attending a meeting, ______ he would have come to your party yesterday.
A. unless
B. when
C. but
D. or
解析：参考解析:连词辨析。本题前后两个小句缺少连接词，根据题意可知，两个句子之间的关系是选择关系，后面的小句使用了虚拟语气。表示选择关系的只有D项的or。A项表示一种假设，"除非，如果不";B项表示时间，"在...时";C项表示转折关系。句意:他在参加会议，否则他昨天就来参加你的派对了
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He tried to _______ his nervousness with smile when he made the speech, which made him much more nervous.
A. relax
B. diminish
C. vanish
D. cover
解析：cover his nervousness
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_______ his number for an hour only to hear a busy signal, she became impatient and called the operator for assistance.
A. Dialed
B. Having dialed
C. To dial
D. Dialing
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The manager of the company insisted that all the staff members ________ the new safety rules.
A. would observe
B. observe
C. observed
D. will observe
解析：参考解析: 译文：该公司的经理坚持要求所有员工遵守新的安全规则。insist表示坚持要求某种做法时，用虚拟语气，因此，动词insist后的宾语从句要用虚拟语气，形式是should+动词原形，其中should可以省略，故选B。
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______ I like the color of the hat, I don＇t like its shape.
A. Unless
B. While
C. Even
D. If
解析：While虽然
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To obtain a visa to enter that country for the first time, you need to apply _________ .
A. in part
B. in person
C. in turn
D. in place
解析：参考解析:本题考查词组辨析。只有B"亲自"符合题意，A意为"部分"，C意为"依次，轮流”，D意为"在适当的位置"，均不合题意。故选B。句意:你必须亲自申请去那个国家的首张签证
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When dealing with a ________ task, Alice always asks for help from people around her.
A. difficult
B. wonderful
C. funny
D. simple
解析：参考解析:本题考查词义辨析。A"困难的”，符合题意，B意为"精彩的”，C意为"有趣的”，D意为"简单的", 均与题意不符。故正确答案为A。句意:每当处理有难度的任务时，爱丽丝总是求助于周围的人。
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l speak in full ________ that our cause is just.
A. conclusion
B. assumption
C. conviction
D. determination
解析：参考解析: 题目意思:我深信我们的诉讼是合理的。conviction. 1.确信,坚定的信仰,坚定的看法(或信念)2.判罪;定罪;证明有罪 3.深信;坚信;坚定;肯定
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China has been following the foreign policy to develop relations with other countries on the _______ of the five principles of peaceful co-existence.
A. bases
B. ground
C. foundation
D. basis
解析：on the basis of 以…为基础; 根据; 按照; 依据;
on the basis of (the five principles of peaceful co-existence)在(和平共处五项原则的)基础上
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