Question

giúp mình sữa lỗi vài câu này với ạ

Answer 1

14. from -> since (HTHTTD nên dùng since)

15. with -> by (learn by heart: học thuộc lòng)

16. have been -> has been (Mathematics tuy có s ở cuối nhưng là số ít)

17. to wait -> waiting (mind Ving)

18. don't lock -> not to lock (told S to V/ not to V)

Answer 2

14. from -> since

15. with -> by 

16. have been -> has been 

17. to wait -> waiting

18. don't lock -> not to lock