. _______ different kinds of pianos, the workers farther improved their quality.
| A．To produce | B．Being produced | C．Produced | D．Having produced |
It is human nature to think back to a golden age ______ one’s country was strong and respected.
| A．if | B．when | C．while | D．after |
The young man, ______ several attempts to beat the world record in high jumping, decided to have another try.
| A．to make | B．making | C．made | D．having made |
---- Are you
still very busy?
---- Yes, I ______ the report for the manager and it won’t take long.
| A．have just finished | B．am just finishing |
| C．had just finished | D．am just going to finish |
--- Why didn’t you buy the gold ring?
---- I ______, but I didn’t have the money.
| A．would have | B．bought | C．would like to | D． had bought |
This company is closing up, so lots of workers will be ______.
| A．laid down | B．laid out | C．laid off | D．laid aside |