—I really don’t know how to thank you enough .
— .
| A．No problem | B．Think nothing of it |
| C．Not at all | D．It doesn’t matter |
---Jack hurt his leg yesterday.
---Really?________?
| A．What’s wrong with him | B．How did it happen |
| C．Wasn’t he too careless | D．Who told you that |
---I love the Internet. I’ve come to know many friends on the Net.
---_______ .Few of them would become your real friends.
| A．That’s for sure. | B．It’s not the case . |
| C．I couldn’t agree more. | D．I’m pleased to know that. |
Not until he retired from teaching three years ago _______having a holiday abroad .
| A．he had considered | B．had he considered | C．he considered | D．did he consider |
_______hard you try, it is difficult to lose weight without cutting down the amount you eat .
| A．However | B．Whatever | C．Whichever | D．Whenever |
A lot of language learning ,_______has been discovered, is happening in the first year of life, so parents should talk much to their children during that period .
| A．as | B．it | C．which | D．this |