【B19】A．sinkedB．fallenC．increasedD．doubled

A．One third of the world's population drinks coffee.

B．Coffee is native to Colombia.

C．Coffee can keep one awake.

D．Coffee drinks were first made by Arabs.

A．and the

B．the

C．is the

D．where it is the

A．because they hunt at night

B．because they cannot see light

C．because they have no cones and rods

D．because they have no cones

A．the most of them

B．most of them

C．the more of it

D．most of it

A．when

B．learned to

C．called

D．the

A．Sensitive

B．Reluctant

C．Uniformed

D．Voluntary

A．about

B．off

C．out

D．forth

A．preparing

B．to be prepared

C．to prepare

D．being prepared

A．they seemed to do less

B．the less they seemed to do

C．less they seemed to do

D．they did less