You never imagine what trouble I have had ______ your house．It took me nearly 2 hours．
| A．to find | B．finding |
| C．found | D．for finding |
I don’t like the way ______ you speak to your mother.
| A．which | B．in that | C．by which | D．/ |
_______ is known to everybody, the moon travels around the earth once a month. .
| A．It | B．As | C．That | D．What |
My father and his teacher talked a lot about the things and persons ___ they could remember.
| A．who | B．which | C．what | D．that |
About ________ of the workers in that steel factory_______ young people.
| A．third-fifths ; are | B．three-fifths ; are | C．three-fives ; is | D．three-fifth ; is |
What an important part the Internet_______ in our life! One can hardly imagine____ life would be like without it.
| A．has; how | B．is; however | C．uses; what | D．plays; what |