500 Câu trắc nghiệm tổng hợp ngữ pháp Tiếng Anh thi THPT Quốc gia (Phần 7)

While the waiter was picking up the broken plates, he ---------- his finger

25/25

While the waiter was picking up the broken plates, he ---------- his finger.

cut

was cutting

had cut

cuts

Giải thích

Chọn A