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What is the best title for this passage?

A. Valeri Polyakov - An Amazing Astronaut
B. The Past and Future of Space Travel
C. Space Cities of the Future
D. Living and Working on the International Space Station

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Vocabulary: Directions:For each of the following sentences there are four choices marked A, B, C and D. Choose the best one to complete each sentence.During economic crisis, people don’t feel safe to __________ their money in any financial program recommended even by banks with good reputations.

A. . reserve
B. . entrust
C. . invest
D. . save

Since your daughter is ___________ to catch a cold, you’d better take her to a hospital and give her a thorough physical examination.

A. . liberal
B. . reliable
C. . logical
D. . liable

Einstein wrote to President Franklin Roosevelt and suggested that the United States should __________ its atomic research program and make building the bomb a top priority.

A. . accelerate
B. . calculate
C. . accumulate
D. . speculate

When he bought Penny her favorite book, the Harry Potter book series, she gave him a __________, sweet smile of thanks.

A. . genuine
B. . actual
C. . real
D. . authentic