桰 don't know ________ with this problem. It's too hard.
梇ou can ask Mr Wang for help.
A. which to do
B. when to do
C. what to do
D. how to do
芒果教輔達(dá)標(biāo)測試卷系列答案科目：初中英語 來源： 題型：013
梂hy did ________ take Aunt Alice almost an hour to get home?
桰 don't know. Maybe there was something wrong with her car.
A. that
B. it
C. she
D. this
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科目：初中英語 來源： 題型：013
桯as William finished writing his gradua-tion paper yet?
桰 don't know exactly, but he ________ all day.
A. is writing
B. has been writing
C. was writing
D. wrote
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科目：初中英語 來源： 題型：022
(用適當(dāng)形式填空)梂hen ______ you ______ (come) to my home again?
桰 don't know. But when I ______ (come), I'll phone you.
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科目：初中英語 來源： 題型：022
(用所給單詞的適當(dāng)形式填空)桯ow soon will the concert start，Daming?
桰 don't know．Oh，listen!They start ________(play)．
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