1 . Killings of African Americans and other ethnic minorities ________ by racial discrimination _______ every now and then.

A．being driven; occur	B．being driven; occurring
C．driven; occur	D．driven; occurring

2 . There is no guarantee that all the vaccines ____ now will succeed. But the failures shouldn’t erode the public trust in the _____ ones.

A．developing…approved	B．being developed…approved
C．developing …be approved	D．developed…being approved

3 . Despite every means ______ to unlock the secrets of nature, there still exist certain elements in the life cycle of the insect that are not fully understood.

A．has been tried

B．have been tried

C．tried

D．tries

4 . After a number of years without a front left foot, the elephant was given a temporary artificial foot ______ and prepare her for a permanent device she received last week.

A．meant to strengthen	B．meaning to strengthen
C．meant strengthening	D．to mean to strengthen

5 . The meeting was held in Pittsburgh, a once-prosperous US industrial center now ______ dramatic job-cuts because of the competition ______ by globalization.

A．facing；bringing about	B．faced；brought about
C．faced；bringing about	D．facing；brought about

6 . As it says in China’s famous novel The Romance of the Three Kingdoms, “It is a truth universally ______ that everything long ______ will fall apart and everything long ______ will come back together again.”

A．acknowledging; uniting; dividing

B．acknowledged; being united; being divided

C．being acknowledged; having been united; having been divided

D．acknowledged; united; divided

7 . Tourism is gaining strong recovery momentum in China, with booming demands on air tickets, accommodations, __________ tours and other services, according to Tripadvisor.

A．parceled

B．packaged

C．packed

D．pacified

8 . It is obvious that nobody wants to make friends with the poor boy        money.

A．suspecting to have stolen	B．suspecting to steal
C．suspected having stolen	D．suspected of having stolen

9 . Zhong Yang, a professor of biology at Fudan University ________ to ________ a collection of seeds for China’s national seed bank was awarded “Model of the Times” by the government.

A．devoted ... build	B．devoted ... building
C．devoting ... build	D．was devoted ... building

10 . Due to the huge amount of construction and operational experience________over the past few years, China’s energy producers can grab a larger share of the global clean energy market.

A．having accumulated	B．being accumulated
C．accumulated	D．has been accumulated