Mr. Xu, can you tell us how to learn English well —Sure. But remember nothing can be learned hard work.

mprehensive surveys have provided the most _________ statements of how, and on what basis, data are collected.

Tom has passed the final exam—______! He never really worked hardbefore

I can’t believe that there are _____ many poor peoplein ____ a rich country.

The contest will take place next week. — Can you be more _____?— Yes, it will be on Saturday morning.[ ]