. In September 2008 , China’s key milestone in space travel_____when Zhai Zhigang conducted the first space walk.
| A．reached | B．was reached | C．has reached | D．had been reached |
Is that a book on farming? If so, I want to borrow___.
| A．this | B．one | C．it | D．the one |
.Who is making so much noise in the garden?
__ the children.
| A．It is | B．They are | C．That is | D．There are |
.—Is there anyone who is gong the Great Wall?
_______
| A．None | B．No one | C．No | D．Not any |
Andeison entered the classroom, ____book in ___hand.
| A．×, his | B．×, × | C．a, × | D．a, the |
She studies ___ medicine before she turned ___ writer.
| A．×; × | B．the, a | C．×; a | D．the; × |