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--- Has James finished his report on his Enquiry Learning yet?\

   ---- I’m not sure. He _____ on it last week.

A. was working                B. has worked                   C. worked                          D. had worked

A huge amount of oil was spilt on the East Sea, the causes of ______ are still under investigation.

A. it                                 B. that                   C. which             D. whom

Can you explain ________ the sun goes down in the west?

A. why is it that                    B. why it is that           C. how it is that          D. how is it that

It is good manners to eat up _______is left in your plate.

A. that                             B. what                  C. which             D. all

 My son has gone abroad. I’m looking forward to him_______.

A. return                         B. to return              C. returning                   D. returned

This ticket _____ one adult and one child to the show.

A. promises                          B. enters                               C. admits   　                        D. includes

— Did a letter come for me this morning?

   — Yes. _____ came for you.

A. That                                  B. It                              C. One                                D. The letter

She is a quiet girl at school，but sometimes she _____ be very naughty.

A. should                          B. would                           C. can                                  D. will

 While I was making the model plane，my little nephew kept asking me questions with great ______ .

A. wonder                        B. patience                       C. doubt                     D. curiosity

—  I really don’t know how to thank you enough.

   —  _____.

A. No problem                                                 B. Think nothing of it         

C. Not at all                                                                D. It doesn’t matter