30. They have to__________ eating their food before entering the MRT
station.
(A) finish
(B) finishes
(C) finished
(D) finishing
答案:登入後查看
統計: A(487), B(13), C(52), D(8), E(0) #1934882
統計: A(487), B(13), C(52), D(8), E(0) #1934882