[单项选择]One day we all may find it useful to have a(n) ______ for sending documents, writing any pictures across the telephone lines.
A. receiver
B. echo
C. extension
D. facility

[单项选择]

We all have offensive breath at one time or another. In most cases, offensive breath emanates from bacteria in the mouth, although there are other, more surprising causes.
Until a few years ago, the most doctors could do was to counsel patients with bad breath about oral cleanliness. Now they are finding new ways to treat the usually curable condition.
Bad breath can happen whenever the normal flow of saliva (唾液) slows. Our mouths are full of bacteria feeding on protein in bits of food and shed tissue. The bacteria emit evil-smelling gases, the worst of which is hydrogen sulfide (硫化物).
Mouth bacteria thrive in airless conditions. Oxygen-rich saliva keeps their numbers down. When we sleep, for example, the saliva stream slows, and sulfur-producing bacteria gain the upper hand, producing classic" morning breath".
Alcohol, hunger, too much talking, breathing through the mouth during exercise -- anything that dries the mouth produces bad brea
A. thrive on
B. account for
C. originate from
D. descend from

[单项选择]As we all know, the same gestures may have different ______ which vary from one culture to another.
A. implications
B. presumptions
C. expressions
D. assumptions

[单项选择]The same one word may have more than one meaning. This is what we call ______.
A. synonymy
B. homonymy
C. polysemy
D. antonymy

[单项选择]The sentence "Grandpa seemed to have all day" means" ______. [A] Grandpa liked to stay with Bob all the time. [B] Grandpa liked telling stories to Bob all day. [C] Grandpa seemed to be lonely all day.

[单项选择]We have done all we could and now our cherished project is at the mercy of our new CEO.
A. under the guidance of
B. in the power of
C. on the verge of
D. on the agenda of

[单项选择]We may have been poor, but we were always ________dressed.
A. respectably
B. respectfully
C. politely
D. respectively

[单项选择]One of the things we have to do to prevent a pandemic is to make sure people understand and know what they can do to minimize the {{U}}commotion{{/U}}.
A. command
B. collusion
C. turmoil
D. tutelage

[单项选择]We have one vacant seat for the 9:30 train because someone cancelled it half an hour ago.
A. 我们9:30的火车上还有一个空座位，因为半小时前，有人来退了票。
B. 我们9:30的火车上还有一个空座位，因为半小时前，有人来取消了。
C. 我们9:30的火车上还有一个空座位，因为半小时前，有些人来退了票。
D. 我们9:30的火车上还有一个座位，因为半小时前，有人来取消了。