Having a trip abroad is certainly good f
问题:
Having a trip abroad is certainly good for the old couple, but it remains _____ whether they will enjoy it. [ ]
A. to see
B. to be seen
C. seeing
D. see
Having a trip abroad is certainly good for the old couple, but it remains _____ whether they will enjoy it. [ ]
A. to see
B. to be seen
C. seeing
D. see