They eat less sugar and that’s ______ they have ______ white teeth.
| A．because, healthy | B．why, health |
| C．because, health | D．why, healthy |
Learn some useful skills, or, I’m afraid, you would ______ nothing in society.
| A．complete | B．perform | C．accomplish | D．finish |
Only_______ stand-up comedians have become famous as television and film actors later on in life._______ person is Billy Crystal.
| A．a few; One such | B．some; A such | C．few; Such a | D．fewer; Such one |
The newcomer went to the library the other day and searched for ________ he could find about Mark Twain.
| A．wherever | B．whatever | C．however | D．whichever |
One of the rules is that every student ________ wear school uniform while at school.
| A．might | B．could | C．will | D．shall |
Tom took a taxi to the airport, only ________ his plane high up in the sky.
| A．finding | B．being found | C．to find | D．to have found |