The girl is very shy, and never speaks until ___ to.
#98679
A
spoken
B
speaking
C
speak
D
be spoken
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Unless ___ to speak,you should remain silent at the conference. 
#94186
A
invited
B
inviting
C
being invited
D
having invited
In April,thousands of holidaymakers remained________abroad due to the volcanic ash cloud.
#94216
A
sticking   
B
stuck
C
to be stuck
D
to have stuck
We’re so much looking forward ____________ you again.
#96233
A
to see
B
to seeing
C
at seeing
D
for seeing