—May I go swimming this afternoon?
— I'm afraid not _______ you have finished your homework.
| A．if | B．unless | C．because | D．but |
Tom isto go to school .
| A．old enough | B．enough old |
| C． very enough | D． so enough |
Steve isn’t as__________ as Kelly.He often makes mistakes in his writing.
| A．careless | B．tidy | C．careful | D．difficult |
He jumped into the water when he heard a boy for help.
| A．call | B．called | C．calling | D．to call |
A car _____ the tree last night.
| A．hitted | B．hit | C．hits | D．hitting |
—you sing an English song?
—Yes,I can.
| A．Can | B．May | C．Must | D．Need |