I just don’t understand 
that leads to so many teenagers addicted to playing computer games.
| A．why it is | B．what it is | C．what it does | D．why it does |
What he said at the meeting means _______ those who had cut down the forests.
| A．to argue against | B．to argue for |
| C．arguing for | D．arguing against |
She won a Nobel Prize for her scientific ______.
| A．interests | B．achievements | C．behavior | D．observation |
The flowers ______ my mother, but my sister thought they were for her and took them.
| A．were intended for | B．intended for |
| C．intended to give | D．intended giving |
I wanted to have the paperby the end of this month.
| A．finish | B．to be finished | C．finished | D．being finished |
I will answer the teacher’s question when _______.
| A．I ask | B．I will be asked | C．asked | D．I shall be asked |