---- ______! There is a bus coming. ---- Thank you very much for telling me. You saved my life!
It is said that sandstorms will become more________ as a result of global warming.
The Sunday of May is Mother’s Day and a time to be _____________ to our mothers.
We have been trying hard to find out the ____________of the homeless man, but without luck, no one can tell who he is.
You can get to Hong Kong using different kinds of ________, by air, by sea or by land.
At the foot of the mountain _________ .