Over 100,000 chemical reactions _____ the brain every second.A.take place inB.take the

The temperature____________, the chemical reaction is being speeded up.A. raisedB. be

What is the most frightening aspect of the chemicals in the world？A．Over 143,000 chemicals

Tax will be levied on those employees whose payments was______.A．over $4, 000B．$40, 000C．o

When were the chemicals first used in America？A．Before the American Revolution.B．Over thir

Thomas Paines pamphlet______sold over 100,000 copies in the first three months of its publ

There are five factories in this region, ______over 100 workers.A．with each haveB．each hav