必修3 unit 1 the world of our senses
单元质量评估
ⅱ. 单项填空(共15小题; 每小题1分，满分15分)
21. all of _____ sudden, i caught ______ sight of my teachers and classmates in the crowd, and then i felt much more calm.
a. a; / b. /; / c. a; a d. /; a
【解析】选a。考查冠词。all of a sudden“突然；忽然”；catch sight of“突然看到……”。资源难易程度:★★★★★★★★★★★★★★★
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