To read Tolstoy and ____ to the nineteenth century Russian literature are two excellent reasons for taking Professor Morrel’s course.
| A．to introduce | B．introduce |
| C．being introduced | D．to be introduced |
_____ the days and months went by, things were getting worse and worse.
| A．With | B．As | C．When | D．While |
My uncle’s house in the downtown area is much smaller than ours, but it is twice
______expensive.
| A．as | B．so | C．too | D．very |
We feel _____ our duty to make our country a better place.
| A．it | B．this | C．that | D．one |
He hurried to the booking office only _____ that all the tickets had been sold out.
| A．to find | B．found | C．finding | D．find |
It was so cold that they had the fire _____ all night.
| A．to burn | B．burn | C．burning | D．burned |