PRACTICE TEST 3- Đại từ nhân xưng, Đại từ sở hữu và Đại từ phản thân
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I ______ no difficulty in learning Russian since I ______ to learn it 3 years ago. A. have had / began B. had had / begin C. had / has begun D. am having / begin

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I ______ no difficulty in learning Russian since I ______ to learn it 3 years ago.

have had / began

had had / begin

had / has begun

am having / begin

Giải thích

Chọn đáp án A