单选题 He turned around after hearing the harsh voice from behind, with a bewildered look on his face.

单选题 As an artist he didn't consider himself constrained by the same rules of social conduct as other people.

单选题 Scientists hope that data from the probe will pave the way for a more detailed exploration of Mars.

单选题 The officials have been discussing ways of stemming the flow of smuggled drugs since last week.

单选题 The company's commitment to providing quality at a reasonable price has been vital to its success.

单选题 In order not to embarrass the interviewee, he maintained his composure despite a desperate desire to laugh.

单选题 They indulged in some highly dubious business practices to obtain their current position in the market.

单选题 They felt that our discussions with other companies constituted a breach of our agreement.