He is an old doctor with a lot of ________. But he has never travelled by air before.Taking a plane was quite ________ experience for him this time.
The sentence needs _______ once more.
The computer centre, _______ last year, is very popular among the students in this school.
Rather than _______ on a crowded bus, he always prefers _______ a bicycle.
_______a reply, he decided to write again.
There seemed nothing else to do but ______ a doctor.