放大电路产生饱和失真或截止失真的根本原因是静态工作点不合适。（）
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--- What does David like?--- He likesbasketball, so he often it in the afternoon.
A. to play; playing
B. playing; to play
C. playing; plays
D. plays; to play
Does Amymusic?
A. likes listening to
B. like listening
C. like listening to
D. likes to listen to
--- Whatyour father often on weekends?--- He often watches TV at home.
A. do; does
B. does; does
C. do; do
D. does; do
Her father is a teacher. Hein a high school.
A. teach
B. teachs
C. teaches
D. teaching
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