The greatest pleasure I know is to do a good action quietly, and to have it _____ by accident.
#99890
A
find out
B
finding out
C
found out
D
be found out
推荐题目
In the last ten years, they _______ three great scientific experiments. 
#103919
A
finished
B
have finished
C
had finished
D
have been finished
—When__________ and visit our exhibition next month?— When_______, I will let you know.
#104214
A
will he come; he will come
B
will he come; he comes
C
does he come; he will come
D
does he come; he comes
He______to several European counties so far.
#103236
A
was
B
has been
C
had been
D
will be