Having a trip abroad is certainly good for the old couple, but it remains _______ whether they will enjoy it. 
#98604
A
to see
B
to be seen
C
seeing
D
seen
推荐题目
He did nothing but ________walk in the street. 
#95370
A
taking    
B
take    
C
to take    
D
took
You shouldn’t stand there _____ the milk ____ over.
#97323
A
watching; boiled
B
watching; boiling
C
to watch; boiling
D
to watch; boiled