When I try to understand ________ that prevents so many children from being happy, there seem to be three causes.
| A．why it is | B．what it does | C．why it does | D．what it is |
Your brother ______you is very kind to me.
| A．and | B．or |
| C．as well as | D．as well |
Mr. Smith is very happy because the cars made in his factory have never been ______.
| A．popular | B．more popular |
| C．most popular | D．the most popular |
If you are looking for a ______, you can make it when it is on sale.
| A．price | B．bargain | C．cost | D．bill |
He has given me so much help that I really want to do something for him ______.
| A．in turn | B．by turns |
| C．in return | D．in answer. |
You are asked to attend the meeting ______ in the hall this weekend.
| A．being held | B．to be held |
| C．held | D．holding |