题目

词汇，根据句意及所给单词完成下列句子。 1. She  may be angry  if you don’t _______ (回答)to her invitation. 2. I don’t think this pair of jeans fits you ________(好). 3. It’s quite dangerous to drive _________ (穿越)the traffic lights. 4. _________（锻炼）regularly is a wise choice for you. 5. The stair is too _______(狭窄) for the fat man to go through. 6. The man has been ________(die) for 11 years. 7. Guangzhou is a _______（south）city that attracts lots of visitors. 8. If you are in a blue mood, you can do your hobbies to cheer ________ ( yo下列有关化学用语使用正确的是A．钙离子的结构示意图： B．乙烯的结构简式：CH2CH2C．CH4分子的球棍模型： D．丙烯的电子式: