1 . The monster has three pairs of legs, each ending in a large c________.(根据首字母单词拼写)

2 . The referee blew a w________ at the end of the game. (根据首字母单词拼写)

3 . Research the relative benefits and d________ of different equipment, such. as treadmills, stationary bikes, free weights, and so on. (根据首字母单词拼写)

4 . In ________ eyes of children, playing on the Internet can only bring them ________ great fun.

A．the; a	B．不填; a
C．the; 不填	D．不填; 不填