属于木本植物的是（）。
A．芭蕉、梧桐
B．牡丹、桧柏
C．垂柳、枇杷
D．苍松、红枫
参考答案：B, C, D
After decades of effort, the city is still trying to _____ how to ban smoking in public places.
A．look through
B．get through
C．figure out
D．take out
