Tom was slow to catch _______, but gradually he began to understand. A. in B. on C. away D. out
Tom was slow to catch _______, but gradually he began to understand.
A. in
B. on
C. away
D. out away
Đáp án: B
Giải thích: catch on: hiểu
Dịch: Tom chậm hiểu, nhưng dần dần anh ấy bắt đầu hiểu ra.