问题
选择题
David used to _____________ in the afternoon.
A．practice swimming
B．practicing swimming
C．practice swim
D．practices swimming
答案
答案：A
题目分析：句意：戴维德过去常常下午练习游泳。used to do sth表示过去常常做某事，practice doing sth是固定搭配，表示练习做某事，故选A。