________ have an internal clock that controls the beating of our heart, and the ________ of our breathing.
| A．Human being; steps | B．Humans; pace |
| C．Human beings; steps | D．Man; pace |
Fireworks, ________ of gun powder or flash powder _______ in a tight paper tube, make the big flash or boom effect.
| A．consisting…wrapping | B．consisting…wrapped |
| C．consisted…wrapped | D．being consisted….wrapped |
In the past few years, research has suggested that Vitamin D may increase the level of serotonin（血清素）, one of the key nurotransmitters influencing our mood, and ________it helps to relieve mood disorders.
| A．that | B．where | C．what | D．which |
Chinese must have the largest number of speakers, ________ ?
| A．mustn’t that | B．haven’t they |
| C．don’t they | D．doesn’t it |
Everybody talks about the taste of great food, but hardly _________ about the tongue and
the nose that make the tasting possible.
| A．anybody talks | B．does anybody talk |
| C．talks anybody | D．nobody talks |
More Than a Game, a documentary which follows NBA star LeBrown James’s path
_________ a star, came out on October 2, 2009 in the US.
| A．to become | B． to becoming | C． in becoming | D．during becoming |