________ both of them should be employed needs _________.

  A. If … considering                                B. What … to consider

  C. That … to consider                            D. Whether … considering

 ______________ is the center of our planetary system was a difficult concept to grasp in the Middle Ages.

  A. It is the sun and not the earth              B. Being the sun and not the earth

  C. The sun and not the earth                   D. That the sun and not the earth

Everyone here will thank the firefighters for the things they have done to prevent fires _________ the environment safer.

  A. make             B. to making          C. to make             D. from making

Yesterday Mrs. Green went to the market, _________ some bananas and visited her cousin.

  A. bought          B. buying                     C. to buy               D. having bought

They need to reserve the restaurant and select the menu months before their father’s birthday party, __________？

  A. don’t they      B. needn’t they      C. mustn’t they      D. need they

 He said French is the beautiful tongue in the world and _______ he was determined to learn it well.

  A. too                B. that                   C. yet                    D. besides

It was the bravery of William Tell _________ encouraged the Swiss people in their fight against the enemies.

  A. that               B. which               C. who                  D. how

________ either you or I to look after her?

  A. Am               B. Is                            C. Are                   D. Should

__________, she could hardly have any time to play with her little daughter.

  A. Busy as she was                          B. As was she busy

  C. She was as busy                          D. As she was busy

Thinking of his son, who had been away for twenty years, __________.

  A. the old man’s eyes were filled with tears

  B. you could see the old man bursting into tears

  C. tears came down from the old man’s face

  D. the old man burst into tears