Professor Jordon is well known for his _____ into the habits of the common housefly.
| A．examination | B．introduction |
| C．research | D．expression |
She said she was glad the difficulty had been _____.
| A．cleared away | B．cleared up |
| C．broken away | D．broken down |
. To get my travelers' checks I had to have the bank _____ a special check for the total amount.
| A．make up | B．make out | C．make for | D．make up for |
. It was a long time before the cut on my hand _____ completely.
| A．healed | B．cured | C．improved | D．recovered |
. The final _____ of the play will take place on Monday.
| A．action | B．performance | C．view | D．sight |
I'm afraid this painting is not by Picasso. It's only a copy and so it's _____.
| A．priceless | B．invaluable | C．unworthy | D．worthless |