题目内容：

比较级 用法
poor countries can provide effective competition with imports of cheap goods,because wages are so much lower than( )in america.
请问这句话的括号里加these,或什么也不加,哪个正确?

优质解答

加those,原句because wages are so much lower than wages in america
为避免重复,加上wages是复数,用those