题目

What makes the space shuttle _____ is that it takes off like a rocket but lands like an airplane.A. exceptional       B. strange       C. unique       D. rare   答案：Cunique同类事物中独一无二的。如：This stamp is unique; all others like it have been lost or destroyed.We often begin our class ________ a song.A. in       B. at        C. with      D. on