WE OUGHT TO TRY TO CLEAN OUR TEETH ... ...A. BETWEEN MEALS...

2. - Đề KSCL giữa kỳ 1 Ạnh 7
Tiếng Anh Đề KSCL giữa kỳ 1 Ạnh 7
2. We ought to try to clean our teeth ... ...A. between meals B. before breakfast C. once a day D. at least twice a day