问题补充:
Mary often studies English by with a group.
A. working
B. work
C. to work
D. worked
答案:
(答案→)A. working
B. work
C. to work
D. worked
解析:因为by为介词,后接动词ing 形式,故选A
时间:2019-12-02 03:05:24
Mary often studies English by with a group.
A. working
B. work
C. to work
D. worked
(答案→)A. working
B. work
C. to work
D. worked
解析:因为by为介词,后接动词ing 形式,故选A