There can be no doubt at all that the Internet has made a huge difference to our lives. Parents are worried that children spend too much time playing on the Internet, hardly (1) ________ doing anything else in their spare time.

A. always: luôn luôn                                         

B. rarely: hiếm                                                          

C. never: không bao giờ                                           

D. ever: bao giờ

=> “hardly ever”: hầu như không