---will you come and -----?

cheer sb.on （赛跑,比赛中）以喝彩声鼓励,为某人加油
* The spectators cheered the runners on.
cheer sb up:（使）变的高兴,（使）振作起来
* Gaive Mary a call,she needs cheering up.
故选B,译为：你会过来为我们加油吗.