【单选题】If___, I want to avoid ____ the rush-hour traffic.
A.
possible; meeting with
B.
possible; to meet with
C.
possibly; meeting with
D.
possibly; to meet with
【单选题】空气中的声速约为345m/s,声音频率f=1000Hz,则波长λ为( )m。
【单选题】Nick: I'm going to try to avoid talking to Dean.
A.
I'm not really up for it.
C.
To tell the truth, I couldn't care less.
【简答题】简述无汉字背景学习者认知汉语的特点与教学。