1.Starting with the ___ that there is life on the planet Mars, the scientist went on to develop his argument.

A.premise

D.presentation

2.After several nuclear disasters, a ___ has raged over the safety of nuclear energy.

A.quarrel

B.suspicion

C.verdict

D.controversy

3.Their diplomatic principles completely laid bare their ___ for world conquest.

A.admiration

B.ambition

C.administration

D.orientation

4.Nowhere in nature is aluminum found free, owing to its alawys ___ with other elements, mostcommonly with oxygen.

A.being combined

B.having combined

C.to combine

D.combined

5.Physics is the present day equivalent of ___ used to be called natural philosophy, from ___most of present-day science arose.

A.which, what

B.that, which

D.what, that

來源:可可英語 http://www.ccdyzl.cn/tem4/201504/369489.shtml