Bộ 40 đề thi Tiếng Anh vào 10 có đáp án - Đề 36
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My son was ill. I had to take a day off to look after him. (so)

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My son was ill. I had to take a day off to look after him. (so)

My son was ill, so I had to take a day off to look after him.

Because my son was ill, so I had to take a day off to look after him.

So my son was ill, I had to take a day off to look after him.

My son is ill, so I had to take a day off to look after him.

Giải thích

Đáp án A