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Most birds find it safe to sleep in the trees,but_______they have eggs or young chicks,they don’t use a nest.

By serving others,a person focuses on someone other than himself or herself,_______can be very eye-opening and rewarding.

Having checked the doors were closed,and_______all the lights were off,the boy opened the door to his bedroom.

It is none of your business _______ other people think about you.Believe yourself.

The village has developed a lot _______ we learned farming two years ago.

He was educated at the local high school,_______he went on to Beijing University.

Choosing the right dictionary depends on_______you want to use it for.

Today,we’ll discuss a number of cases___beginners of English fail to use the language properly.

____parents say and do has a life-long effect on their children.

Last week,only two people came to look at the house, ______wanted to buy it.