Some countries are increasing their use of natural gas, and other forms of ________.
| A．source | B．energy | C．power | D．material |
Andeison entered the classroom, ____book in ___hand.
| A．×, his | B．×, × | C．a, × | D．a, the |
This is the short story that he has written.
A. three hundred and forty-fifth
B. three hundred and forty-fifth
She studies ___ medicine before she turned ___ writer.
| A．×; × | B．the, a | C．×; a | D．the; × |
He cut the cake.
| A．in halves | B．in half | C．into halves | D．into half |
His uncle gave him books to read, but after a page or two he would put __book down and pick up__ new one.
| A．the,/ | B．a; a | C．a; the | D．the; a |