疾病发展的典型经过包括潜伏期、_________、临床症状明显期和________期。
Why were the parents unhappy with theirlifestyle?
A. It was too routine.
B. They didn't like their jobs.
C. Their children were unhappy.
D. They couldn't save enough money.
2. What was their children's first reaction tothe idea?
A. They didn't care.
B. They were shocked.
C. They were negative.
D. They were supportive.
What do we know about their trip?
A. It took less than a year.
B. They made their trip U.K.-based.
C. They began their trip in Nottingham.
D. Their route was driven mainly by
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