We tend to realize the value of __ (我们所拥有的东西) until there is no more of it in our life.

Questions 17-20

Answer the following questions using NO MORE THAN THREE WORDS.

What did the speaker especially like about the holiday？

He was a very serious and gifted individual, and __ (他不允许任何事情干扰他的研究), not even under the most extreme circumstances.

forced to introduce still further innovations for the reasons given above.

One of the children from the other family was a __ than the speaker.

Questions 24-27

Complete the sentences using NO MORE THAN THREE WORDS.

Martina says that native speaker students often continue talking even if non-native speaker students, like her, ______.