---- How did you know the surprising news?                 ---- I happened ____ the event then.
#89560
A
to cover
B
to be covering
C
covering
D
to have covered
推荐题目
The manager promised to keep me ____ of how our business was going on.
#89380
A
to be informed
B
on informing
C
informed
D
informing
Mary seems _______ the bad news, for she looks nice and happy.  
#92386
A
not to have learned
B
not to be hearing
C
not having learned
D
not to be