Mom，don’t you think it's OK to play once in a while ____________ it doesn’t affect my studies?
| A．even if | B．unless |
| C．so that | D．as long as |
How long do you thinkthe car factory launches a new model?
| A．will it be until | B．it will be before |
| C．will it be when | D．it will be that |
—Haven’t you solved the problem yet?
—Sorry, but I promise it in an hour.
| A．will be settled | B．will settle |
| C．has been settled | D．has settled |
________ the heavy snow came, the weather got colder and colder.
| A．As | B．Since | C．With | D．While |
Jackson as well as his classmatesgoing to learn Shakespeare’s works next week, of which somehard to understand.
| A．are; is | B．are; are | C．is; is | D．is; are |
In our opinion, teaching a foreign language is science.
| A．as much an art as | B．as many an art as |
| C．as many arts as | D．so much an art as |