问题
选择题
Private cars really provide much convenience to people, and ___ they cause too many problems.
A．meanwhile
B．therefore
C．otherwise
D．instead
答案
答案：A
题目分析：meanwhile同时，期间；therefore因此，所以；otherwise否则，另外；instead反而，代替。句意：私人汽车真的给人们提供了许多方便，同时它们也引起了许多问题。结合语境可知选Ａ。