1.In each of the following groups of words, there are four underlined letters or letter combinations marked A, B, C and D. Compare the underlined parts and identify the one that is different from the others in pronunciation.
A、game
B、late
C、trade
D、have
Newspapers, magazines, televisions and computers all fight to____our attention.
A、hold
B、bring
C、carry
D、pull
How does exercise sharpen the mind according to Para.2?