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1. Suddenly he caught ________sight of a man who went into the telephone booth to make ________ call.

       A. a; a                          B. /; /                           C. /; a                          D. a; /

2. He climbed silently ________ of seizing the thief ________.

A. on purpose; by surprise                                 B. on purpose; surprisingly

C. for the purpose; surprised                              D. for the purpose; by surprise