问题
选择题
As we know,we'll fly to the moon one day.[ ]
A. are able to
B. be able to
C. is able to
D. can
答案
答案：B
搜题请搜索小程序“爱下问搜题”
As we know,we'll fly to the moon one day.[ ]
A. are able to
B. be able to
C. is able to
D. can
答案：B