I’m sure that your letter will get attention. They know you’re waiting for the reply .

Ms Li is strict________her work；however，she is not so strict________her students.[ ]

Look at ______ boy wearing a brown hat. Is he _________ university student

－Shall we go to Alberta for the summer holiday－_____. It’s one of the world’s cleanest cities.

There is an increasing concern _____________ about Ebola infection. Every country has taken necessary measures to prevent it.