Lawrence Craven,a doctor from the USA,is the author of several published reports,one of ________introduced the idea in 1953 aspirin could reduce the risk of heart attacks.
| A．them; when | B．which; that | C．what;that | D．which; when |
Her husband felt it would be silly to __ the colour of the curtains before they had painted the room.
| A．change | B．find | C．choose | D．lose |
He spoke so quickly that I didn't _____ what he said.
| A．receive | B．accept | C．take | D．catch |
Every time he tried to start the car, the wheels _____ deeper into the mud.
| A．stayed | B．sank | C．fell | D．dropped |
As the storm drew near, black clouds were _____ over the sky.
| A．smoothing | B．wandering | C．running | D．gathering |
It's no _____ arguing about it, because he will never change his mind.
| A．time | B．while | C．use | D．help |