The cost of living in Chengdu is among the lowest in China, ________ the quality of life is probably one of the highest.
| A．since | B．when | C．as | D．while |
—I havelearning math and I'm so worried. Could you help me?
—Sure. I'd be glad to.
| A．problems | B．interest |
| C．troubles | D．fun |
—I hear Mario never tells a lie.
—That's right. He is anboy.
| A．active | B．honest |
| C．outgoing | D．lazy |
—is the population of your factory?
—It has apopulation because it's a new factory.
| A．How many; big | B．What; small |
| C．How big; small | D．What; big |
—How long?
—For two years.
| A．have you borrowed this book | B．you have borrowed this book |
| C．you have kept this book | D．have you kept this book |
—I saw Mr.Smith in the office at ten yesterday morning.
—That's impossible. Hean Enghish party with us then.
| A．has | B．was having |
| C．had | D．has had |