I often go to school _____ bus.
A. on B. in C. by
Don’t make Tom ____ the work by himself because he isn’t _______.
| A．to do; old enough | B．to do; enough old |
| C．do; old enough | D．do; enough old |
His father worked for _______ after twelve o’clock.
| A．another three hours | B．more three hours |
| C．three another hours | D．three hours more |
Although he is very old, ______ he works very hard.
| A．so | B．but | C．and | D．/ |
We decided ______at home _____ the bad weather..
| A．staying ; because | B．to stay ; because of |
| C．staying ; because of | D．to stay; because |
—____ do you exercise?
—Four times a week
| A．How much | B．How often |
| C．How long | D．How many |