1 Fine freshwater pearls are found in the main stream and the tributaries of the Mississippi River.

A banks

B deltas

C branches

D currents

2 The flower bud of a water lily opens at sunset since its opening is triggeredby the decreased light.

A alleviated

B endured

C set off

D covered up

3 Tryouts for community orchestras are frequently judged by committees.

A Advertisements

B Auditions

C Performances

D Novelties

4 A turbulent storm was a major factor in the defeat of the Spanish Armada.

A noxious

B violent

C mysterious

D pathetic

5 Light rays are turned aside by the intense gravitational field surrounding a black hole.

A heightened

B deflected

C rotated

D created

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