20. —Why was __ you lost all your keys？
—It was because of my carelessness.
| A．that | B．what | C．it that | D．One |
.
He has been doing the job for many years, but has never felt ________ it, though his workmates think it is a ________ one.
| A．tired of; tired | B．tired of; tiring | C．tiring of; tired | D．tiring of; tiring |
.
The faces of four famous American presidents on Mount Rushmore can be seen from a ________ of 60 miles.
| A．length | B．distance | C．way | D．space |
.
People in Jilin are proud of ________ they have achieved in the past ten years.
| A．how | B．that | C．what | D．which |
.
— Sorry to have interrupted you. Please go on.
— Where was I?
— You ________ you didn’t like your father’s job.
| A．had said | B．said | C．were saying | D．had been saying |
.
. The doctor will not permit him ________ until his foot is better.
| A．walk | B．to walk | C．walking | D．walked |