6. Lucy usually cleans the cage every two days. (對畫線部分提問)_ _______ Lucy usually clean the cage?

　　　　[剖析] 答案為How often does。對every two days提問要用how often。

　　　　7. I didn't understand __________，so I raised my hand to ask...

　　　　A. what my teacher says B. what does my teacher say　C. what my teacher said D. what did my teacher say

　　　　[剖析] 答案為C。本題為賓語從句，由于需要用陳述語序可排除B、D;另外，主句時(shí)態(tài)為一般過去時(shí)，則從句也要用對應(yīng)的過去時(shí)態(tài)，故還可排除A。

　　　　8. ---- How much ______ the shoes?　---- Five dollars ______ enough.

　　　　A. is;is B. are;is C. are;are D. is;are

　　　　[剖析] 答案為B。shoes作主語時(shí)，謂語動(dòng)詞應(yīng)用復(fù)數(shù)形式;five dollars是一個(gè)整體，應(yīng)按單數(shù)對待。

　　　　9. 誤〕 We got to the top of the mountain in daybreak. 〔正〕 We got to the top of the mountain at day break.

　　　　〔析〕 at用于具體時(shí)刻之前，如：sunrise, midday, noon, sunset, midnight, night。

　　　　10. 〔誤〕 Dont sleep at daytime 〔正〕 Dont sleep in daytime.

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