There is _____ pollution in the world. We must stop it.
| A．much too | B．too much |
| C．many too | D．too many |
—How many English words do you think I should know?
—As many as you ______. Then you will find reading quite easy.
| A．will | B．must | C．can | D．might |
Being honest is the first ______ if you want to make friends with others.
| A．step | B．time | C．job | D．hand |
Before the bridge was built ______ the river, the villagers had to take a boat to the other side.
| A．in | B．beside | C．across | D．along |
—Can you tell the differences between these two pictures?
—Differences? Oh, no. They look quite ______.
| A．different | B．similar | C．strange | D．interesting |
—Hey, man. You can’t cross the street now. You have to wait ______ the traffic turn green.
—Oh, sorry and thank you.
| A．when | B．after | C．until | D．while |