Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction.
The foreign student advisor recommended that she studied more English before enrolling at the university.
A. foreign
B. studied
C. enrolling
D. the
Đáp án là B
Cấu trúc: QKHT+ before+ QKĐ/V_ing: một việc diễn ra trước một việc khác.