Dr. White has rich _________ in dealing with the children who have had bad _________.
| A．experience; experiences | B．experiences; experience |
| C．experience; experience | D．experiences; experiences |
After _________ seemed like hours, a nurse wheeled Doris out of the emergency room.
| A．that | B．there | C．which | D．what |
---I am going to the supermarket to buy a quilt.
--- ________ You can easily buy one on the Internet.
| A．Why not? | B．Good idea! | C．Why bother? | D．By no means. |
The doctor persuaded him to _____ smoking.
A throw away B put out C give up D take away
That boy spent much time _____ computer games.
A play B playing C played D to play
I am too tired. I _____ my homework all morning.
A have been doing B did C do D have done