题目

根据句意，用括号中所给单词的适当形式或句子的语法要求填空。 1. Playing too many computer games is    ▲    （harm） to you. 2. We should speak to the old man    ▲    （polite）. 3. —How many    ▲    （tooth） does a dog have?    —Sorry, I have no idea．Let’s search on the Internet. 4. A computer is    ▲    （expensive） than a TV set. 5. Have you read    ▲    （today） newspaper?  6. I    ▲    （not go） to bed until my mother came back at ten last night. 7. You need    ▲    （return） the comic book to the library at once. 8. My sister    ▲    （be） a singer since she left the school. 答案： 1.harmful     2.politely       3.teeth      4.more/less expensive 5.today’s      6.didn’t go     7.to return    8.has been

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