20.
a. Classes always start at one o’clock and finish at half past five.
b. Class always start at one o’clock and finish at half past five.
c. Classes always starts at one o’clock and finish at half past five.
d. Classes always start in one o’clock and finish at half past five.
Bạn đang xem 20. - T ANH 7 65 CAU TRAC NGHIEM
