1.The Ponderosa pine is _____________ of most the timbers used by forest product firms in the Black Hills of South Dakota.
a.The source
b.As source
c.The source which
d.because the source
Answer : A. The Source
5.Underlying aerodynamics and all other branches of theoretical mechanics are the laws of motion who were developed in the seventeenth century.
Answer : D.Who
7.After listening to Humphry Davy,Faraday realized that _______
a.Wanting to be a scientist
b.Being a scientist
c.wanted to be scientist
d.he wanted to be a scientist
Answer : C.Wanted to be scientist
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