把下列词语排成一句通顺的话。

①还没  瀑布  声音  看见    听见  先  的  瀑布

②站  瀑布  在  伟大  仰望  脚下  好  呀

填空。

①You mustn't walk around during landing. ____   A. On a bus

②You mustn't talk to the driver.____         B. On a train

③You must wear a helmet .____          C. On a bike

④You must wear a seatbelt.____           D. On a car

⑤You mustn't put your head out of the window.____   E. On a plane

⑥You must wear a lifejacket.____       F. On a boat