It is the protection for the trees___________ really matters, rather than how many trees are planted.
| A．what | B．that |
| C．不填 | D．which |
Having answered the phone, I couldn’t but ______ what would happen next.
| A．wondering | B．wondered | C．wonder | D．to wonder |
All of us remember the earthquake that ______ Wenchuan in 2008.
| A．attacked | B．struck | C．knocked | D．exploded |
Paul had to write a history paper, _____ he couldn’t find time to do it.
| A．but | B．so | C．because | D．if |
They want to know ______do to help us.
| A．what can they | B．what they can | C．how they can | D．how can they |
I’d like to study law at university ____ my cousin prefers geography.
| A．though | B．as | C．while | D．for |