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 |
All the machines stopped _____ with the electricity _____ throughout the factory.
| A．working; cut through | B．to work; cut down |
| C．working; cut off | D．to work; cut up |
You should try to get a good night’s sleep ________ much work you have to do.
| A．whichever | B．whenever | C．however | D．whatever |
Neither Tom nor Jack and I ________ his students, but each of us ______ him very much.
| A．am; likes | B．is ; love | C．are ; likes | D．was; loves |
You can’t imagine no one in the village _____ him and what difficulty we had ______ his family.
| A．knowing ; finding | B．knew; to find |
| C．known; in finding | D．to know; found |
He is perfectly _______ to live in the mountain, feeds some lovely chicken and _______ what he likes all day.
| A．popular; draws | B．anxious; painted |
| C．proud; described | D．content; paints |