I explained the rules of the game carefully. However, he didn't understand them. A. I explained the rules of the game carefully, so he didn't understand them. B. Although I explained the rul

10/50

I explained the rules of the game carefully. However, he didn't understand them.

I explained the rules of the game carefully, so he didn't understand them.

Although I explained the rules of the game carefully, he didn't understand them.

Because I explained the rules of the game carefully, he didn't understand them.

He didn't understand the rules of the game, but I explained them carefully.

Giải thích

Đáp án đúng: B

Hai mệnh đề có nội dung tương phản nhau => dùng “although (mặc dù) + S + V, …”

Dịch nghĩa: Mặc dù tôi đã giải thích luật chơi một cách cẩn thận nhưng anh ấy vẫn không hiểu.