How many novels … Charles Dickens …?
A. does – write
B. did – write
C. did written
D. have – written
Đáp án đúng là: B
Dùng thì quá khứ đơn vì sự việc đã xảy ra trong quá khứ
Dịch: Charles Dickens đã viết bao nhiêu cuốn tiểu thuyết?
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You can volunteer by … children from poor families in your community.
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Circle the mistake and then correct it.
Frank has done his homework and then listened to music.
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