Unless ___ to speak,you should remain silent at the conference. 
#94186
A
invited
B
inviting
C
being invited
D
having invited
推荐题目
Mr. Liu dreamed ____ a big house for his parents after they retire.
#92717
A
to buy
B
to buying
C
of buying
D
of being buying
____that she didn’t do a good job,I don’t think I am abler than her.
#97887
A
To have said
B
Having said
C
To say
D
Saying