—We can’t be successful _______ we keep working hard.
—I agree with you.
| A．if | B．unless | C．because | D．as |
—The film “Big Head Son and Small Head Dad” is enjoyed by children.
— ___________.
| A．So does it . | B．So it does. |
| C．So it is. | D．So is it. |
Mr. Li, with his wife and son, often ________ to Ganshan for skiing in winter.
| A．go | B．went | C．going | D．goes |
—Mr. Li will check our homework this afternoon. _____ you _____it ?
—Not yet. I am doing it right now.
| A．Do, finish | B．Had, finished |
| C．Have, finished | D．Will, finish |
— When ________ America __________ by Columbus?
— In 1492.
| A．is, discovered. | B．was, discovered. |
| C．was, discovering. | D．was, discover. |
Don't go to crowded places, _______ you may have the flu easily.
| A．and | B．but | C．or | D．so |