Which of the following is closest in meaning to the underlined word “plummeted” in Paragraph 3？
A. Punished timely.
B. Spread widely.
Continued gradually.
Dropped sharply.
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请阅读短文。完成第小题。Donnas fourth grade classroom looked typically traditional. Yet something seemed different that day when I entered it for the first time.My job was to make classroom visits and encourage i
A. Donna and Her Pupils
B. The "I Can't" Funeral
C. The "I Can't" and Its Relatives
D. The "I Can't" Touches the Lives of Everyone
We must improve the farming method（）we may get high yields.
A. in case
B. in order that
C. now that
D. even if
What can be inferred from the last paragraph？
A. Babies’ cries have long been the concerns of scientists.
Babies start their speech acquisition at the age of three months.
C. Studying babies` cries helps us understand their speech perception.
D. Babies’ true speech, rather than their cries, should be the focus of study.
Neither the unpleasant experiences nor the bad luck（）him discouraged.
A. have caused
B. has causeD
C. has made
D. have made
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