________the working efficiency，the boss allows the employees to have a coffee break.
| A．Improving | B．To improve |
| C．Having improved | D．Improved |
---- Are your family ready for rafting?
----Yes, I really want my children to experience that they are young.
| A．\ | B．if | C．unless | D．while |
----It’s thirty years since we last met．
----But I still remember the story, believe it or not, _____ we got lost on a rainy night．
| A．which | B．that | C．what | D．when |
-----You’ve got a stomachache? But we ate at the same place. How come my stomach is fine?
------You have an iron stomach! Mine isn’t ___ strong.
| A．as | B．such | C．much | D．enough |
German Chancellor Angela Markel says united Europe could fail if Eurozone (欧元区) over debt problems in Greece, Italy and other weaker economies.
| A．pulls up | B．pulls down | C．breaks up | D．breaks down |
She didn’t come back to her hometown for five years and ______, she had got married and had a couple of kids.
| A．to be honest | B．above all | C．on the other hand | D．in the meantime |