Sharon is __________ great success as a singer. It’s _________great honor to go to her concert at the      opera house.   .

A．a, the            B．\ , the            C．\ , a              D．a , a

If you want to see the chairman of the department, you’d better make an _________ with his secretary first.

A．assumption        B．appointment       C．agreement        D．admission

People drank a kind of tea _________ from leaves _________ a special chemical to reduce body pains and fever.

A．making , possessed                      B．made , possessing

C．having made, possessed                  D．having been made, possessing

Not only _____________ vital for reducing fever, but __________ also other things that it can help with.

A．aspirin has proved, are there              B．has aspirin proved, there are

C．has proved aspirin, are there              D．aspirin had proved, there are

Another drug that has helped improve people’s health is penicillin, _________ is _________ by many _________ one of the most important medicines.

A．which, considered, being                 B．that, considering, been

C．that, to consider, being                   D．which, considered, to be

If penicillin _____________ available, many people ______________ from sickness.

A．weren’t , would have died               B．shouldn’t be, would die

C．hadn’t been, would have died            D．is, will die

Do you know in what circumstances was it____________ Jack achieved his goal?

A．how             B．where            C．when             D．that

While doubts about the medicine’s safety have____________, interest continues to grow.

A．dropped out       B．fell down          C．withdrew from     D．faded away

__________ these tips, and your time _______ doing research on the Internet _________ much worthwhile.

A．Following, will spend, is                   B．Followed, spent, was

C．Follow, spent, will be                     D．To follow, spending, has been