A: Do you mind if I use your pen?

B: _____ Which pen do you want to use?

C: How about this pen?

① Sure  

② Certainly  

③ Yes, I do. 

④ Of course  

⑤ No, I don't.

2. 다음 두 문장의 뜻이 서로 다른 것은?¹⁾

① I don't think it's possible.

  = I'm not sure it's possible.

② I'll keep my fingers crossed.  = Good luck.

③ Here is one important thign you should keep in mind.

 = Here is one important thing you should remember.

④ This book is made up of twelve short stories.

 = This book is composed of twelve short stories.

⑤ I am able to cope with the problems.

 = I am able to understand the problems.