Cell phones _______ by more and more teens and many new functions _______ to them nowadays.
A.are using, have added | B.is used, are adding |
C.are being used, have been added | D.being used, were added |
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Cell phones _______ by more and more teens and many new functions _______ to them nowadays.
A.are using, have added | B.is used, are adding |
C.are being used, have been added | D.being used, were added |