Paper produced every year is ________ the world’s production of vehicles.
| A．the three times weight of | B．three times the weight of |
| C．as three times heavy as | D．three times as heavier as |
—Listen! I heard the birds ______ around us.
—Yeah, what beautiful music!
| A．sang | B．sing | C．to sing | D．singing |
—Are you going to Tom’s birthday party?
—________. I might have to work.
| A．It depends | B．Thank you | C．Sound great | D．Don’t mention it |
—How can I improve my memory?
—________
| A．Why don’t play concentration games? |
| B．One thing you could do is play concentration games. |
| C．What about to play concentration games? |
| D．It might be a good idea playing concentration games. |
—Do you know where I can get someone ______ my skirt?
—You can have your skirt ______ at Main Street Cleaners.
| A．to shorten; shorten | B．to shorten; shortened |
| C．shortened; shortened | D．shortened; to shorten |
When I arrived at home, my husband was lying on the floor, ______ the kids with toys.
| A．entertains | B．entertaining | C．entertained | D．to entertain |