第9题: [单项选择]Why not_________ Professor Li for help He is kind —hearted and willing to help. A. ask B. you ask C. to ask D. your asking 参考答案:A 答案解析:本题考查的是固定句型Why not do sth./Why don’t you do sth.如:It’s a good day today.Why not go for a walk 今天天气不错,
第30题: [单项选择]The increasing global warming will have a devastating effect on some coastal areas, or ______ many scientists have warned. A. so B. it C. thus D. that 参考答案:A 答案解析:此句为省略句,A. so在此代替前面整个句子的内容,放在后半句之前作承前省略。而B. it和D.that虽然也可以代替前文的内容,但是它们不能像so那样采用倒装语序,只能用正常陈述语序,即如果这里用i