There are, of course, bad teachers as well as ________.
—How long is it ______ you picked up your badminton training?—It was not until my finance became better last December _____ I started the training.
—Pity you missed the lecture on nuclear pollution. —I _____it, but I was busy preparing for a job interview.
She was reading a book in her chair _____ first time I saw _____ old lady.
_____ team wins on Saturday will go through to the national championships.
As we all know, it is usually cold in this place in January, but it _____ be warm sometimes.