问题
选择题
—Where 're the children. Sam?
—Oh, they _____ football on the playground. [ ]
A. play
B. played
C. are playing
D. have played
答案
答案:C
—Where 're the children. Sam?
—Oh, they _____ football on the playground. [ ]
A. play
B. played
C. are playing
D. have played
答案:C