塔里木盆地中心生长着我国古老树种“沙漠英雄”指的是什么的原始森林？（）
A、梭梭
B、胡杨
C、红柳
参考答案：B
— _____ your friend play the guitar?
— Yes, he can, but he can't play it well. [ ]
A. Must
B. Can
C. Should
D. Need
