how long does it usually take to get there?

how long does it usually take to get there?
about15 minutes,( )on the traffic
A depenging B depengds
C to depend D depended 为啥选A
（ ）for playing computer games many times，he is still obsessed with them.
A blaming B blamed
C to blame D having blamed 为啥选b 像这样的开头动词怎么确定形态