________ many times, but he still could not understand it.
-Hello! Is Mr. John in the office?-Yes. But I'm sorry. He is busy __________ and can't speak to you.
The government declared that it would __________ an end to some unfair policies the next month.
_________ last term we had finished our experiments.
It's surprising that your brother __________ Russian so quickly-he hasn't lived there very long.A. picked up B. looked upC put on D.made up
“It’s such a nice place.” Mother said as she sat at the table __________ for customers.