Cách làm cho bạn:
1. Could 4. could
2. can 5. could
3. can't 6. can
LANGUAGE FOCUS (Ability: can and could; Question with How...?
EX5: Complete the sentences using can, can't, could, or couldn't. (Hoàn thành các câu sử dụng "can, can't, could, couldn't")
1. Could 4. could
2. can 5. could
3. can't 6. can
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