To make the air clean，Beijing will close some companies________cause heavy pollution．
A．that
B．who
C．what
Jack seems _______ than you ______ ready for the exam.
| A．busy; to get | B．much busier; getting |
| C．busier; to get | D．more busier; getting |
He is _____ unusual writer. He can write _____ useful book.
| A．a; the | B．a; a |
| C．the; an | D．an; a |
---Peter，is there anything else you want to know about China?
---Yes，I am still wondering __________ .
| A．how is Chinese paper cut made |
| B．how was the Great Wall built in ancient times |
| C．why the Chinese people like to play the dragon dance |
| D．why do the Chinese people eat rice dumplings at Dragon Boat Festival |
--- Thank you for supporting the volunteer project．
---________．Many hands made the light work.
| A．All right． | B．Never mind |
| C．Don’t mention it | D．It doesn’t matter |
He was brave enough ___________ for the school volleyball team and succeeded.
| A．try out | B．to try on |
| C．to try out | D．to try |