Americans eat ________as they actually need every day.
| A．twice as much protein | B．twice protein as much twice |
| C．twice protein as | D．protein as twice much |
Read it aloud _____ the class can hear you.
| A．so that | B．if | C．when | D．although |
_____ you go, don't forget your people.
| A．Whenever | B．However | C．Wherever | D．Whichever |
It is about ten years _____ I met you last.
| A．since | B．for | C．when | D．as |
They will never succeed, _____ hard they try.
| A．because | B．however | C．when | D．since |
_____ still half drunk, he made his way home.
| A．When | B．Because | C．Though | D．As |