“底醋”适用的菜肴是（）。
A．红烧类
B．熘制类
C．炸制类
D．白炒类
参考答案：D
－It's difficult 'for the village children to cross the river for school.
－I think a bridge _________ over the river [ ]
A. should be built
B. is being built
C. has been built
D. was built
