In much of the animal world, night is the time ________ for sleep —pure and simple.
| A．set aside | B．set down |
| C．set off | D．set up |
We want such materials ________ can bear high temperature and pressure.
| A．that | B．as | C．what | D．which |
Her sister has become a lawyer, _____she wanted to be.
| A．who | B．that | C．what | D．which |
Space exploration has been made ______ with the development of modern science and technology.
| A．it possible | B．it was possible | C．that possible | D．possible |
My money ___. I must go to the bank to draw some of my savings out before I've none in hand.
| A．has run out | B．is running out | C．has been run out | D．is being running out |
A mysterious illness, referred to as “ a typical phenomena”, has been brought under control, the government said on Wednesday, ______ no cause of it has been made public.
| A．though | B．when | C．that | D．because |