All the preparations for the project ______, we’re ready to start.
| A．completed | B．have been completed |
| C．had been completed | D．been completed |
It was ______ creative thinking that I took the course, not to get high marks in examinations.
| A．developing |
| B．to develop |
| C．develop |
| D．being developed |
The children enjoyed ______ round the newly polished floor.
| A．sliding |
| B．slid |
| C．to slide |
| D．being slid |
It is a waste of time ______ him – he is determined to go his own way.
| A．warning |
| B．warned |
| C．warn |
| D．having warned |
He began ______ in the early fifties, singing and ______ the guitar.
| A．performing; play |
| B．performed; played |
| C．performing; playing |
| D．performed; playing |
I saw her ______ the letter into the envelope and then ______ the envelope into the postbox.
| A．stuck; put |
| B．sticking; putting |
| C．stick; to put |
| D．stick; putting |