单项选择题
A.hand in B.give in C.take in D.result in
As time goes on the organic material is buried deeper a...
单项选择题As time goes on the organic material is buried deeper and hence（）higher temperatures and pressures.
A.is made up of B.is absorbed in C.is exposed to D.is known as
Petroleum is a result of the（）of plant or animal matter...
单项选择题Petroleum is a result of the（）of plant or animal matter in areas which are slowly subsiding.
A.depression B.description C.destruction D.deposition
They do this by doing well-informed about their subject...
单项选择题They do this by doing well-informed about their subjects, being honest in what they say, by using sound evidence, and by employing（）reasoning.
A.valley B.value C.vary D.valid
