The brain ___________ grey and white matter, _______ weighs just over a kilo.
| A．consists of, it | B．consist of, which | C．is made up of, it | D．is made up of, which |
．Hundreds of people gave their lives in __________ of freedom.
| A．protection | B．guard |
| C．defence | D．favor |
________ on ten years of observation and study, Professor Wang announced that everyone dreams every night，whether they realize it or not.
| A．Basing | B．Based |
| C．Been based | D．Having based |
The air has leaked out of this football.Could you get it ________ up?
| A．blow | B．blowing | C．blown | D．to blow |
________ the right decisions ________ the future is probably the most important things we'll ever do in our lives.
| A．Making；concerned | B．Made；concerning |
| C．To make；concerned | D．Making；concerning |
—What do you think made Celia so happy?
—________a prize in the recent competition.
| A．As she won | B．Won |
| C．Winning | D．Because of winning |