He knew little about the world nature. 

  A. The more forests we cut down, the hotter the Earth becomes. 

  B. The more we cut down forests, the hotter the Earth becomes. 

  C. The more forests we cut down, the Earth becomes hotter. 

  D. The more we cut down forests, the Earth becomes hotter. 

A. border 

B. verge 

C. margin 

D. rim 

A. Consequently 

B. Nevertheless 

C. Even though 

D. In spite of 

A. Not at all. Help yourself. 

B. No, thanks. 

C. Sorry, I have no idea. 

D. Certainly, it’s true. 

A. talk 

B. speak 

C. know 

D. confide 

A. In no way can John be held responsible for the accident. 

B. Certainly can’t John be held responsible for the accident. 

C. For any reason can John not be held responsible for the accident. 

 D. On no account can John not be held responsible for the accident. 

A. I’m afraid I don’t know. 

B. I’m sorry. I’ll call again later. 

C. Sorry. Can you take a message? 

D. Sure, I’ll put you through.