—Lily is going to make a presentation in class this afternoon.—Oh, really? I ________ it was Michael's turn.

When I talked with my grandma on the phone, she sounded weak, but by the time we ___ up, her voice had been full of life

People wrote letters to get in touch in the past. Nowadays email has       the way people communicate.

The snowstorm ________ our difficulties.

China’s economic and social development requires more substantial reforms, as unnecessary government influence on the private sector has _______ an abuse of authority.