题目内容
(请给出正确答案)
[主观题]
Itisdifficult______aworldrecordandevenmoredifficultto______it. A.keeping,set B.keep,s
It is difficult ______a world record and even more difficult to ______it.
A. keeping, set
B. keep, set
C. set, keep
D. to set, keep
查看答案
如果结果不匹配,请 联系老师 获取答案