look so many passengers --- with their smart phones on the undergrounda\ played b\ will playc\ are playingd\ have played说理由!
问题描述：
look so many passengers --- with their smart phones on the underground
a\ played
b\ will play
c\ are playing
d\ have played
说理由!
答
当然是C了，现在进行式，看，这么多的乘客在地铁上正在玩他们的手机。
答
为你解答。
Look! So many passengers ( c\ are playing ) with their smart phones on the underground.
瞧！这么多人在地铁玩手机。
解释：开头的提示词look表明句子的动作是正在发生的，要用现在进行时态。
答
D are playing (现在进行时）
看,车站好多人带着行李在玩手机.