单选题：Such a database would be extremely costly to set up.

题目内容：

Such a database would be extremely costly to set up. A．establish
B．destroy
C．update
D．transfer

参考答案：

答案解析：

A child learning his native language has the advantage of ha

A child learning his native language has the advantage of having private lesson

分类：综合类题型：单选题

The reason why children learn their mother tongue so well lies solely in their

分类：综合类题型：单选题

The Americans recognize that the UN can be the channel for greater diplomatic ac

分类：综合类题型：单选题

You s.hould take many factors into consideration when going for an interview.A．

分类：综合类题型：单选题

The most pressing problem any economic system faces is how to use its scarce re

分类：综合类题型：单选题