题干
Only when the meeting was over___ go back to meet his friend.
A：he could
B：he was able to
C：was he able to
D：was able to he
答案(点此获取答案解析）
C
A：he could
B：he was able to
C：was he able to
D：was able to he
. There are twenty 
and eighteen 
on the farm. You can see eleven 
, thirteen
and fifteen
.