There were few doctors, _____ he had to work very hard _____ his own.
| A．and; in | B．because; at | C．so; on | D．when; for |
| A．idea | B．head | C．weather | D．bread |
| A．cool | B．tooth | C．foot | D．choose |
| A．says | B．pay | C．way | D．stay |
______ students went to the show yesterday.
| A．Hundreds of | B．Two hundreds |
| C．Hundred of | D．Two hundred of |
If it tomorrow, we to climb mountains.
| A．doesn’t rain; go | B．won’t rain; will go |
| C．won’t rain; go | D．doesn’t rain; will go |