问题
选择题
He ______ trees in his garden just now. [ ]
A. was seen planting
B. was seen plant
C. is seen to plant
D. has been seen to plant
答案
答案：A
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He ______ trees in his garden just now. [ ]
A. was seen planting
B. was seen plant
C. is seen to plant
D. has been seen to plant
答案：A