—What made you so delighted at Christmas？
— .
| A．As there was an unusual celebration |
| B．My uncle’s coming back from abroad |
| C．I received many more presents than others |
| D．Because my parents promised me a new car |
---What in the world put you in a really bad mood?
--- ________in the traffic for hours.
| A．Stuck |
| B．Being stuck |
| C．To be stuck |
| D．Sticking |
In the next five years，the government's work will be evaluated________on people's happiness level instead of GDP alone.
| A．based |
| B．to be based |
| C．basing |
| D．having based |
________the young man is in great need of a computer in his work is known to his boss.
| A．What |
| B．That |
| C．How |
| D．When |
The average Facebook user in the United States has 245 friends，according to a study ______in February.
| A．publishing |
| B．published |
| C．publish |
| D．to publish |
_______ on the top of the mountain is an ancient tower ______ back to two hundred years ago.
| A．Standing；dating |
| B．To stand；to date |
| C．Having stood；dating |
| D．Stand；dated |