单项填空;从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。
Please pick up the _______. Don’t keep it on the floor.
A. water B. paper C. books D. bottles
单项填空;从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。
Please pick up the _______. Don’t keep it on the floor.
A. water B. paper C. books D. bottles
B