It is the first time that I _______ this kind of moon cake.
The fog was so heavy this morning that drivers could hardly _______ the things even ten meters away from them.
His computer, which cost him a sum of money several weeks ago, is out of order and wants _______, though it looks very new.
I’ll go and see you whenever _______.
— How about the suggestion Prof. Smith put forward at the meeting last Friday? — The committee discussed it for hours without a decision _______.
The poor man, ______, ran out of the dark cave.