Ms  Wang  is  an  excellentteacher.________ in our class loves her.

Don’t        the bus until it stops. It’s dangerous.

--Everyone wants to keep healthy without too much effort.--So let's start from our mouth by _______ those healthy foods, which people can easily get in their daily life. 

At the top of the high mountains, there is very _____ oxygen in the air.

______ the soldiers will go to help find the missing plane.