莫扎特的音乐特点是（）。
A.活泼幽默富有民间情调
B.庄严神圣充满史诗感
C.抒情诚挚流畅
D.热情奔放狂野
参考答案：C
Jack wasn ' t saying anything but the teacher smiled at him _____ he had done something very clever. [ ]
A. as if
B. in case
C. while
D. though
国土及依附于国土的( )是一国进行经济社会活动的基本条件。
A．自然资源
B．环境治理
C．生产力
D．环境保护
