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He is so young, ________ he knows a lot.

It says a tiger escaped ________ the zoo two days ago.

--Whose book is this?

--It must belong _________.

--________ come and join us in the game?

--________. But I must meet my uncle at the airport.

Jane likes singing. We often hear her ________ after class.

Colors can change our moods and make us ________ happy or sad, energetic or sleepy.

It's time for sports. Let's ________ bowling, shall we?

You look tired. You'd better ________ a good sleep.

It's my turn to be ________ duty today. I have to go to school early.

--Does your grandfather often read newspapers ________ breakfast?

--Yes, he does.