The boys seldom eat snacks ______the girls often eat them.
| A．and | B．but | C．or | D．because |
—What do you think of the dress?
—Wonderful. I don’t think I can find a _________ one.
| A．good | B．better | C．bad | D．worst |
—Mr Hu, can you tell us how to learn math well?
—Sure. But remember nothing can be learned _________ hard work.
| A．by | B．at | C．without | D．for |
—Mom, can I leave my homework for tomorrow?
—I’m afraid not. Don’t _________ what you can do today till tomorrow.
| A．put on | B．put down | C．put up | D．put off |
_______ you wait a few more minutes? It’ll be your turn soon.
| A．Must | B．Should | C．Could | D．Might |
—I called you at 4:00 yesterday afternoon, but no one answered.
—Sorry, I ______ with my friends at that time.
| A．swim | B．swam | C．will swim | D．was swimming |