– How is the _______________ in Hangzhou?– Awful. There are always long lines of cars on roads. 

My teacher gave me much ________ on how to study English well when I had some trouble.

Mr. Brown had got a __________ and he went to see a dentist.

---Have you heard the good _______?---Yes! The radio says China will send an explorer(探险家）to Mars. 

My school is about twenty ________ walk from here.