问题
选择题
14. Many new games are designed on the computers all the time; people of all ages ______ these games.
A．are playing
B．had played
C．have been playing
D．Play
答案
C
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14. Many new games are designed on the computers all the time; people of all ages ______ these games.
A．are playing
B．had played
C．have been playing
D．Play
C