下列各组城市中均分布在我国北方地区的是 [ ]
A．西安、成都、哈尔滨
B．天津、沈阳、长春
C．北京、呼和浩特、银川
D．武汉、石家庄、郑州
答案：B
Their water is _________ hot to drink. [ ]
A. very
B. too
C. to
D. very much
He asked us to ____ him ______ carrying through their plan. [ ]
A. assist; with
B. help; to
C. assist; in
D. help; with
