Tom____for the busA.waitB.to waitC.is wait

Tom____for the busA.waitB.to waitC.is wait
Tom____for the bus
A.wait
B.to wait
C.is wait

Tom____for the busA.waitB.to waitC.is wait
is waiting

都错了,建议你选D

我晕，三个答案一个都不对怎么选？高手给我答案，我也好奇啊！

都错了
可以是is waiting或waits