单项选择题

While the causes of the Cretaceous-Tertiary extinction have received the most attention, Alvarez’s paper points out work on the other major mass extinctions that may also be（）for the tragedy.

A．answerable
B．indefensible
C．pitiable
D．reprehensible
E．avoidable

<上一题目录下一题>

热门试题

单项选择题

They were certain that this problem, like so many other（）problems, did not ever have to be（）, but could be resolved through oblique means.

A．insoluble ； solved
B．nettlesome ； faced
C．winsome ； ignored
D．troublesome ； categorized
E．fulsome ； persuaded

单项选择题

The teacher has（）catering to some students, but to retain his tenure, which effects only after a teacher has unanimously gratified his students, he offers his complaints（）

A．a hesitancy about ；carelessly
B．an aptitude for ； sparingly
C．a repugnance toward ；tactfully
D．an enthusiasm about ； zealously
E．a blitheness about ； carefully