He paid for a seat, when he free.
| A．should have entered | B．could have entered |
| C．could enter | D．would enter |
It is reported that two schools，________ are being built in my hometown，will open next year.
| A．they both | B．which both |
| C．both of them | D．both of which |
Peter received a letter just now ________ his grandma would come to see him soon.
| A．said | B．says | C．saying | D．to say |
______ he referred to in his article was unknown to the general reader.
| A．That | B．What | C．Whether | D．Where |
The Town Hall ______ in the 1800’s was the most distinguished building at that time.
| A．to be completed | B．having been completed |
| C．completed | D．being completed |
After a knock at the door, the child heard his mother’s voice ______ him.
| A．calling | B．called | C．being called | D．to call |