30. British scientists said teenagers are programmed to take risks because they enjoy the thrill of dangerous situations________ others.
| A．more than | B．less than | C．other than | D．rather than |
Jackson who was famous for his high energy performances _________ during the Democratic National Committee benefit concert, A Night at the Apollo once.
| A．was performed | B．performed | C．performing | D．was performing |
It was decades ago ________ I was in my teens ________ the Chinese government decided to reform the social economic system.
| A．when; when | B．that; which | C．when; that | D．before; that |
She tried hard to keep calm in face of the students, but the sweat on her forehead _____ her ____.
| A．gave; away | B．tuned; down | C．showed; out | D．shut; off |
After retirement, Mr. Smith ______ painting, which he had always loved but had not had time for.
| A．took up | B．got up | C．help up | D．looked up |
You’d better ______ some hot water into the bottle in case the teacools down.
| A．add | B．fill | C．fill in | D．put |