Since two months ago, many waste bottles
题型:选择题
问题:
Since two months ago, many waste bottles_____ by the student in Class One. [ ]
A. collected
B. have collected
C. were collected
D. have been collected
Since two months ago, many waste bottles_____ by the student in Class One. [ ]
A. collected
B. have collected
C. were collected
D. have been collected