必修三 unit4 astronomy：the science of the stars 1.《原创》 ！your troubles will soon be over． a. cheer up b. turn up c. take up d. look up 《解析》振作起来吧！你的困难不久就会过去的。cheer up(使)高兴；(使)振奋；感到高兴；感到振奋《答案》a 《教材原句》i cheered up immediately and floated weightlessly around in our spaceship cabin watching the earth become smaller and the moon larger. 2.《原创》read english regularly, and you will
