I’ve already told you that the fourth and last part of the article ______ the most difficult to understand.

A. is               B. was              C. are              D. were

 Keep yourself confidence up by taking gradual steps forwards, rather than freezing, when ______ with what seems like great trouble.

    A. to face          B. face             C. facing           D. faced

 Mr Smith was a strict headmaster, but ______ all the teachers and students in our school showed respect for.

A. that          B. the one        C. one              D. who

 She didn’t recognize the man who hit her because she could only ______a dark shape moving towards her.

A. make out         B. turn out       C. set out       D. bring out

 China understands the situation and needs of underdeveloped countries on the issue of climate change and urges developed countries to support them______ technology and finance.  

A. in spite of      B. owing to         C. regardless of    D. in terms of 

 — Is that the country clinic you often refer to?

   — Right，just the one ______ you know my father used to work for 10 years

    A. that         B. which            C. where            D. as

 For professional athletes, ________ to the Olympics means that they have a chance to enter the history books.

A. access           B. attachment       C. appeal           D. approach

 — You may find the key to the maths problem on page 107.

— Ah, it’s so simple. I wonder why I ______ of that.   

A. hadn’t thought                  B. haven’t thought        

C. didn’t think                    D. wasn’t thinking

 Low-carbon lifestyle is of great benefit to improve the world environment．         can be

    enjoyed from it until you have a deep understanding of it，however．

    A．Something        B．Nothing          C．Few              D．Much

 Too high house prices can be brought under control，     ___the authorities introduce a series

    of regulatory policies．

    A．even if          B．as if                C．so that          D．provided that