Calcium, the most abundantly mineral in the body, works with phosphorus in maintaining bones
and teeth.
A. in maintaining B. abundantly C. in the body D. works with

Commercial airliners do not fly in the vicinity of volcanic eruptions because even a small amount
of volcanic ash can damage its engine.
A. volcanic ash B. a small amount of
C. in the vicinity D. its engine

I don’t like John. His ______ complaints make me angry.
A. continuous B. constant C. permanent D. continual

_____ members of my family has a share in doing household chores.
A. All B. Each of the C. None of D. Every

The ground is wet. It ______ rained last night.
A. may have B. might have C. must D. must have

There's still no ______ about the reason why the Malaysian plane was mysteriously lost.
A. clarity B. clear C. clarify D. clearance

_______ you should do first is make a list of all the things you have to do.
A. What B. That C. As D. If

______ the noise and pollution in the city, the Browns move to the countryside.
A. Being tired of B. Be tired of C. Were tired of D. Tired of

Conservationists ______that experiments on animals be stopped.
A. recommended B. banned C. said D. complained

Nothing can ______the loss of the child.
A. come up with B. make up for
C. make up with D. do with