Seeing their teacher________into the classroom,they stopped________at once.
The shop owner suddenly stopped talking with his mouth like a big “O”. It was the President!
—Has David finished his project yet? —I guess not. He on it at lunchtime. Do you want me to confirm it?
I hope the train will arrive on time, but it’s my control.
—Do you drink much coffee as before? —No,at all. My sleeping problem is getting worse.
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