1 . ________ he became seriously ill in 1998, the famous writer had been carrying out comparative studies of classical Chinese texts.

A．Since

B．When

C．Although

D．Until

2 . The fear is that ______we don’t start taking this litter out of the sky soon, it will become a significant   threat to active satellites. (用适当的词填空)

3 . The dinoflagellate is so tiny ______ 6，000 of these organisms may be contained in a single drop of water. (用适当的词填空)

4 . This could be bad news if you still primarily use cash, ______ that’s how you pay your bills or how you budget. (用适当的词填空)

5 . I’ve been fond of hiphop music ________ Hiphop Man was shown on TV.

A．while

B．since

C．unless

D．until

6 . The proposal, debated at this year’s CITES Conference, lists Mako sharks under Appendix II, meaning that they can’t be traded ______ it can be shown that fishing wouldn’t threaten their chances for survival.

A．until

B．unless

C．whether

D．when

7 . The manager said he supported the move________ he didn’t think it would make much of a difference

A．so that

B．in order that

C．now that

D．even though

8 . A new study sheds light on what’s going on inside our brains ______we match our music to our feelings. (用适当的词填空)

9 . Any academic breakthrough, ________, does not automatically ensure that it can be applied to practice.

A．since it may be brilliant	B．brilliant though it may be
C．how brilliant it may be	D．if it may be brilliant

10 . Child________ she is, she knows a lot about the universe.

A．as

B．during

C．so

D．although