—_______ do you go to see your grandparents?—Once a week.
There are a group of people over there. What do you think __________?
It’s said that his father was attacked __________ a dog __________a farm nearby.
—What do you think of __________ idea of taking part in ‘Earth Hour’? —Wonderful! I’ve never heard of __________ one! We can reduce pullution in this way.
---Do you mind opening the window?the air inside is not so fresh. --- __________, Mr. Smith is taking a nap (小睡),don’t make him catch a cold.
---It is so easy _______ him to get along with, many students love him. --- Yes , he is _______ to each student.