单选题 Finding a job can be ___ and disappointing, and therefore it is important that you are prepared.

单选题 The teacher asked each of us ___ what he had been doing.

单选题 To write up his novel, John is looking for an environment free ___ outside distraction.

单选题 She could hardly ___ laughing .

单选题 If law and order ___, neither the citizen nor his property is safe.

单选题 _Why can’t you and Bill go to the movies tonight? -We are ___ a history test tomorrow.

单选题 We can accept your order ___ payment is made in advance.

单选题 You can’t get across the river ___ by swimming.