21.Now a paper in Science argues that organic chemicals in the rock come mostly from ______ on earth rather than
on Mars.
A.configuration
B.constitution
C.condemnation
D.contamination
22.The library has a vital role in our search for knowledge.It serves as a workshop for the entire college or university, students and ______ alike.
A.executives
B.faculty
C.crew
D.staffs
23.In general, matters which lie entirely within state borders are the ______ concern of state government.
A.extinct
B.excluding
C.excessive
D.exclusive
24.The old sailor had never studied navigation, but he had good _____ knowledge of it.
A.periodical
B.tropical
C.empirical
D.vertical
25.He _______ the truth at last by questioning all the bots in the school.
A.caused
B.resulted
C.aroused
D.elicited
26.The new secretary has written a remarkably ______ report only in a few pages but with all the details.
A.concise
B.clear
C.precise
D.elaborate
27.The lady in this strange tale very obviously suffers from a serious mental illness.Her plot against a completely innocent old man is a clear sign of _______.
A.impulse
B.disposition
C.insanity
D.inspiration
28.The two playwrights worked in close ______ with each other on the script.
A.collaboration
B.circulation
C.coalition
D.inspiration
29.The police stopped me the other day as I was driving home, because I was ______ the speed limit.
A.transcending
B.exceeding
C.surpassing
D.overtaking
30.Some people are more _____ to sea-sickness.
A.inclined
B.liable
C.likely
D.apt