When workers are organized in trade unions, employers find it hard to lay them ________.
A、offD
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The student found the novel _______. It provided him with so much information about the subject.
She had clearly no ________ of doing any work, although she was very well paid.
She got a job as an assistant stage manager at the Cambridge Arts Festival Theatre, thinkingthat it might ________ to a career as a playwright ( 劇作家 ).
Be careful, _______ you'll fall down.
________, John has been to several foreign countries.
