China has been considering raising the retirement age since 2008 to ________ its shrinking workforce and aging society.
| A．set off | B．put off | C．bring about | D．cope with |
They were standing so far away that I couldn’t_____ their faces clearly.
| A．make out | B．make for | C．make off | D．make up |
The dining room is clean and tidy, with a table already ______for a big meal．
| A．being laid | B．laying | C．to lay | D．laid |
____ some teenagers don’t realize is ____ difficult life can be after they get addicted to drugs.
| A．What；how | B．What；what | C．That；how | D．That；what |
Among Asimov's most famous works of science fiction, one _____he won an award, was the Foundation Trilogy.
| A．of whom | B．of which | C．for whom | D．for which |
Some retired people have nothing to do. They often get together and ____for hours talking about their past experiences.
| A．look around | B．get around | C．turn around | D．sit around |