问题补充:
The missing boys were last seen near the river.
A. playing
B. to be playing
C. play
D. to play
答案:
(答案→)A. playing
B. to be playing
C. play
D. to play
解析:现在分词作主与补足语,表示进行。
时间:2022-01-02 14:44:29
The missing boys were last seen near the river.
A. playing
B. to be playing
C. play
D. to play
(答案→)A. playing
B. to be playing
C. play
D. to play
解析:现在分词作主与补足语,表示进行。