小型矿井涌水量是指（）。
A、Q﹤100m3/h
B、Q﹦100—500m3/h
C、Q﹦500—1000m3/h
D、Q﹥1000m3/h
参考答案：A
—Are you going to help John with his Chinese this evening?
—No, He ________ to England. He will be back next month. [ ]
A. returned
B. has returned
C. returns
D. will return
