The math’s problem remained confusing to the boy although ______ over and over.
| A．explaining | B．being explained | C．explained | D．having explained |
It is _____ impossible.
| A．very | B．quite | C．rather | D．fairly |
Don’t leave your work____, .
A done half B. half done C. a half done D. done a have
Four is ____ of two.
| A．double | B．two | C．the two | D．the double |
This is the ______ short story that he has written.
A. three hundred and forty-fifth
B. three hundred and forty-fifth
He has lived at____ for 30 years.
| A．No. 101 heping Street | B．101 Heping Street |
| C．Heping Street 101 | D．Heping Street No. 101 |