_____ late in the morning, Mr. Smith turned off the alarm.
| A．Sleep | B．To sleep |
| C．Sleeping | D．Having slept |
We have done things we ought not to have done and_____ undone things we ought to have done.
| A．left | B．leave | C．will leave | D．leaving |
When you write to him, please _____ him.
| A．give my loves to | B．give my regard to | C．remember me to | D．give my wishes for |
-- Tom works hard at English.?-- _____, and _____.
| A．So does he; so you do | B．So you do; so is he |
| C．So he will; so do you | D．So he does; so do you |
After he gave a report about the school, Mr White____ the visitors around it.
| A．went on to show | B．went on showing | C．went on with showing | D．kept on showing |
It is believed that ______ European chemist called Felix Hoffmann first produced ASA which completely changed ______ man’s understanding of aspirin.
| A．an; a | B．the; a | C．a; / | D．an; / |