第一部分：单项选择（共20小题；每小题1.5分满分30分）
1. Born with a great talent for music, Brian is very likely to turn _____ musician.
A. a B. / C. an D. the
2. A clean environment can contribute to the tourism of the city, which ____will promote its economic development .
A. in nature B. in return C. in turn D. in fact
3. The pace of life in small towns is much faster than _____in big cities.
A. that B. it C. one D. this
