单项选择题


Questions 18 to 20 are based on the following talk.

A． The underground oil resources have not been affected.
B． Most of the desert animals and plants have managed to survive.
C． The oil lakes soon dried up and stopped evaporating.
D． The underground water resources have not been polluted.
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单项选择题
The author devoted himself to scientific studies at Los Alamos because______.
A． he appreciated its scientific environment
B． he esteemed its distinguished scientists and treasured their accomplishments
C． it obtained support from Washington
D． its leaders were all able to cope with the potential damage to its programs.
单项选择题
A． To make the Lend-lease plan operate effectively.B． To realize the America desire to aid Britain.C． To convince the general public that American moral support to Britain was crucial.D． To create a favorable public opinion on America’s good intentions.
A． To make the "Lend-lease" plan operate effectively.
B． To realize the America desire to aid Britain.
C． To convince the general public that American moral support to Britain was crucial.
D． To create a favorable public opinion on America’s good intentions.
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