1 . In a world ________ by cooperation rather than isolation, the pattern of sharing tasks and decisions ________ for equality.

A．characterized… makes	B．characterized… are made
C．characterizing… are made	D．characterized… is made

2 . 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

3 . Students        are required to put the appropriate word into each blank.

A．being tested

B．to test

C．are being tested

D．test

4 . 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

5 . 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

6 . Hobbies mainly ________ for relaxation and enjoyment vary from person to person.

A．pursuing

B．pursued

C．being pursued

D．having pursued

7 . The result showed that the        light of Kindle was similar to that of the print book, so it was unlikely that reading on such a non-light-emitting device        negative effects on sleep.

A．reflected...would have	B．reflecting...had
C．reflected...had	D．reflecting…would have

8 . Switzerland's biggest bank UBS is to take over its troubled rival Credit Suisse in a deal        at preventing a financial crisis        to spread around the world.

A．intending, threatening	B．intended, threatened
C．aimed, threatening	D．aiming, threatened

9 . Commercial banks make most of their income from interest _________ on loans and investments in stocks and bonds.

A．earn

B．earned

C．earning

D．to earn

10 . Pie, pita, torta, tarte. ________it’s called, the idea applies across the globe because everyone loves a piece of filled, ________goodness.

A．However, baked	B．No matter how, baking
C．No matter what, baked	D．Whatever, baking