问题补充：
Be careful to move the equipment --- it gently.
A. doing
B. do
C. to do
D. done
答案：
A. doing
(答案→)B. do
C. to do
D. done
解析：选B构成祈使句。
如果觉得《Be careful to move the equipment --- it gently.A. doingB. doC. to do D. done》对你有帮助，请点赞、收藏，并留下你的观点哦！
失眠网，内容丰富有趣，生活中的好帮手！
