Directions:In each of the following groups of words, there are four underlined letters or ltter combinations marked A, B, C and D. Compare the underlined parts and identify the one that is different from the others in pronunciation. Mark your answer by blackening the corresponding letter on the Answer Sheet.
A、challenge
B、cheap
C、choose
D、character
What is the passage mainly about?
A、Socrates’beliefs of philosophy.
B、Socrates’outlook on death,
C、Socrates’influence on youths.
D、Socrates' questions about universe.
What happened after the engineer learmed“doing nothing ?