71.   _________________ the advertisement, he decided to buy the house.

72.   Although he didn’t mention any names at the meeting, everyone knew who he was __________.

73.   He had a good ___________ English so he got a job in an international company easily.

74.   He has been ____________ becoming a scientist.

75.   You can keep the book _____________you return it to me tomorrow.

Please refer to the   before you switch on the engine.

Please refer to the   before you switch on the engine.

A．introductions      B．explanations       C．instructions        D．expressions

Please refer to the              before you switch on the engine.

1. A.
   introductions
2. B.
   explanations
3. C.
   instructions
4. D.
   expressions

________ people may refer to television for up-to-the-minute news, it is unlikely that

   television _______ the newspaper completely.

   A. When; replaces           B. Although; has replaced

C. What; is to replace      D. While; will replace