Questions 22-25 are based on the following passage. What is the "lead" in a pencil made of.’

A．offers the lowest prices to its passengers
B．keeps passengers better informed of its operations
C．offers better services than any of its member airlines alone
D．is intended to make round-the-world trips more Challenging

A．She thinks that the man should be more interested in sports.
B．She thinks that the man should work harder on his studies.
C．She thinks it is worthwhile for him to do so.
D．She thinks he is right.