Jack knows his lesson well because he______ it.
Câu hỏi: Jack knows his lesson well because he______ it.
A. studies
B. studied
C. has studied
D. had studied
Câu hỏi trên thuộc đề trắc nghiệm
Trắc nghiệm Unit 3 Tiếng Anh lớp 9 phần Language Focus - A trip to the countryside