1,He tried to limit himself to ____ 10 cigarettes a day.
A. be smoking
B. have smoked
C. smoke
D. smoking
2,A lot of progress has been done since their country became independent.
A. a lot of
B. done
C. became
limit yourself/sb (to doing sth/to sth): to restrict or reduce the amount of sth that you or sb can have or use: giới hạn, giảm cái gì
Tạm dịch: Anh ấy cố gắng giảm hút 10 điếu thuốc mỗi ngày.
~Học tốt~