15000 bài tập tách từ đề thi thử môn Tiếng Anh có đáp án (Phần 12)

We use modern methods (24)_________ teaching and learning, and the school has a language laboratory, a video camera and recorders.

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We use modern methods (24)_________ teaching and learning, and the school has a language laboratory, a video camera and recorders.

in

of

on

for

Giải thích

Đáp án B