20. After inventing a sign language for the deaf in the mid 1700s, Giacobbo Rodriguez Pereira ()his business activities in order to devote all his energies to humanitarian work. A. release B. submit C. surrender D. abandon ...

15. In the Persian Gulf area, oil is found in () and its production has been able to keep up with world demand. A. elaboration B. abundance C. elegance D. efficiency ...

4. He was a philosopher who wrote plays and poems and essays () his doctrine A. expounding B. forgo C. explosive D. presided ...

40: I bent over and he stood on tiptoe to give me a peck on the chin. A: 错误 B: 正确 ...

29: Many plants grow well in warm dry climates. A: 错误 B: 正确 ...

44: Xu Ling’s mother is a famous surgeon .She has invited to help with a major operation at Chaoyang Hospital . A: 错误 B: 正确 ...

6: The villagers refilled my radiator and give me extra bananas to take along in case of my radiator should give my trouble again. A: 错误 B: 正确 ...

22: As soon as the chairperson stopped, they began to speak all at once . A: 错误 B: 正确 ...

24: We haven't heard from Jane for a long time. What do you suppose () to her? A: was happening B: to happen C: has happened D: having happened ...

6. Have you () any information? No, I’m going to () the business department. A. picked up; call at B. picked out; call on C. got; call on D. received; drop in ...