____________ to do the repair, and what you need is only a hammer and some nails.

----You haven’t been to Beijing, have you?----_____. How I wish to go there!

Although Fleming discovered Penicillin, it was over a decade ______ someone else turned it into the great drug of the 20th century. 

(2009福建顺昌模拟)——We can never forget the days _______ the two astronauts in spaceship worked together and the days ________ we spent together.

With the development of science and technology，there is no doubt ________ Chinese astronauts will land on the moon in the near future.