74. _______ is well known, _______ Hong Kong returned to China on July 1st, 1997.

A. It, that           B. As, /            C. As, as           D. It, which

【解析】B 句子中间有逗号隔开，此句考查的是非限制性定语从句。

73. _______ was known to them all that William had broken his promise ______ he would give each of them a gift. 

A. As; Which         B. What; that      C. It; that           D. It; which

【解析】C。第一空填 it，为形式主语；第二空填that，用以引导一个同位语从句，修饰 promise。

72. “Look at that lady on the stage. She’s already forty.” “You are joking. She doesn’t look ________.”

A. so                 B. it                C. that            D. this

【解析】 B。it 指 her age。look one’s age 为习语，意为“容貌与年龄相称”。

71. Why don’t you bring ______ to his attention that you are too busy to do it? 

A. this                B. what            C. that             D. it

【解析】D。it 为形式宾语，真正的宾语是 that you are too busy to do it.

70. They live on a busy main road. ______ must be very noisy. 

A. There              B. It              C. That             D. They

【解析】B。it 指环境。

69. They are good friends. _______ is no wonder that they know each other so well.

A. This              B. That             C. There         D. It

【解析】 D。it’s no wonder that… 意为“难怪……”、“……不足为怪”，为英语固定表达，其中的 it’s 也可省略，即只说 No wonder that…。

68. Does ________ matter if he can’t finish the job on time?

A. this              B. that              C. he             D. it

【解析】 D。it doesn’t matter if…, does it matter if… 等为英语常用表达。

67. ― I don’t know whether I should go abroad or not, Mum.

― I leave _______ to your own judgment whether you should do it.

A. that              B. it               C. this               D. what

【解析】B。it 为形式宾语，真正的宾语是 whether you should do it.

66. _______ is well known _______ Hong Kong returned to China on July 1st, 1997.

A. It, that                 B. As, /          C. As, as           D. It, which

【解析】A。it 为形式主语，其后的that从句为主语从句。比较下面一题，答案选B：

65. The Parkers bought a new house but ______ will need a lot of work before they can move in.

A. they              B. it            C. one               D. which

【解析】B。it 指前面提到的 new house。注意不能选D，因为其前有并列连词but。