As a defense against air-pollution damage, many plants and animals_________ a substance to absorb harmful chemicals.
A、relieve
B、release
C、dismiss
D、disclose
A few minutes after the plane had taken off, it _________to the ground,
A、crashed
B、crushed
C、dashed
D、flashed
A better working environment improves people's performance, and _________ productivity.
A、furthermore
B、hence
C、moreover
D、even
A completely new situation will ________ when the examination system comes into exist-ence.
A、rise
B、arise
C、raise
D、arouse
A dark suit is preferable _________a light one for evening wear.
A、to
B、than
C、for
D、against
A cork will ________ in water, but a stone sinks.
A、fly
B、flow
C、float
D、drift
A_________ gain or profit is the actual gain after all working expenses have been paid.
A、gross
B、net
C、positive
D、negative
A friendship may be _________, casual, situational or deep and lasting.
A、identical
B、original
C、superficial
D、critical
A good newspaper publishes both __________ and foreign news.
A、current
B、latest
C、recent
D、domestic
A deputy director will be _________the whole factory next week when the director is away for a month.
A、in favor of
B、in charge of
C、in place of
D、on behalf of
A good teacher must know how to _________ his ideas.
A、convey
B、display
C、consult
D、confront
A great many people are often willing to sacrifice higher pay for the _________ of becoming white collar workers.
A、privilege
B、advantage
C、profit
D、preference
A good way to ________ a language is to live in the native culture with the native speakers.
A、require
B、acquire e
C、inquire
D、sustain