--This dress looks beautiful.How much is it?
--It _____me more than a thousand yuan.
| A．spend | B．paid | C．took | D．cost |
If there are ______ trees, the air in our city will be _______ cleaner.
| A．less, more | B．more, more |
| C．more, much | D．much, more |
You shouldn't ____ the boy's mistakes．
| A．laugh at | B．smile | C．laugh | D．laugh down |
______our teacher is ill, ______ he still comes to our class to teach us.
| A．Though; but | B．Though; / |
| C．Although; but | D．But though |
The teacher said that the earth ______ around the sun.
| A．moves | B．move | C．moved | D．had moved |
I felt it hard to keep up with my classmates. But whenever I want to__ __，my teacher always encourages me to work harder.
| A．go on | B．run away |
| C．give up | D．give back |