If everyone obeys the traffic rules, the road will ___.
| A．safe | B．dangerous | C．be safe | D．be dangerous |
The young man ___ the bike was so ___ that he had an accident.
| A．by, careless | B．by, careful | C．on, careless | D．on, careful |
He is late, ___ his bicycle is broken.
| A．and | B．while | C．what’s more | D．as soon as |
If your father ___ in a hurry, he will be late.
| A．isn’t | B．doesn’t | C．won’t | D．won’t be |
When you get on a bus, the conductor will usually warn you ___ a thief.
| A．about | B．to | C．at | D．on |