1．在…岁时_____________  2．因为_________________________

3．意识到…__________   4．第一次飞行_____________________

5．进入太空___________    6．快速地增长___________________

7．和…一样美味_______  8．穿特殊的靴子___________________

9．使某人想起某事____  10．对…有把握的___________________

11．Is there any __________________(可能性) for him to pass the driving test?．

12．The bus is too _________(拥挤)to hold so many people．

13．It is not certain whether these plants can ____________(生产)water．

14．__________(重力) will be a problem for the early settlers on Mars．

15．Can you 1end your ____________(字典) to me to look up a word?

16．My mobile phone can __________(储存)400 telephone numbers．

17．The climber carried some food in a __________(背包)on his back．

18．Astronauts in space have to eat ___________(干缩的)food．

19．My new camera has good _____________________(质量).