问题
The students of Class 7 are going to the seaside this weekend.—Remember _____ them not to keep _______ alone in the sea. It’s dangerous.
A:telling; swimming
B:telling; to swim
C:to tell; to swim
D:to tell; swimming;
B:telling; to swim
C:to tell; to swim
D:to tell; swimming;
正确答案是：
