Since we ____ for almost two weeks, I’ll need to buy a large backpack in advance to carry my supplies of food and water.
| A．have walked | B．will be walking |
| C．have been walking | D．walked |
---- It is generally believed that teaching is __________it is a science.
| A．an art much as | B．much as an art as |
| C．as an art much as | D．as much an art as |
----Three students came late to school this morning, Tom and Jack_______.
| A．were included | B．were including | C．included | D．including |
----Drinking is harmful_______our health.
| A．to | B．be | C．with | D．at |
----Must I finish the jod at seven o’clock?
----No, you___________
| A．mustn’t | B．can’t | C．needn’t | D．don’t have |
---- The reason why he has been such a success is ________he had lost his money.
| A． \ | B．because | C．that | D．what |