the brown horse can ____1___very fast.look it's____2____with a dog a.run running b.runs,runningc.run,run
问题描述：
the brown horse can ____1___very fast.look it's____2____with a dog a.run running b.runs,running
c.run,run
答
选a.
can+动词原形
be+动词ing
答
选a，1，can后跟动词原形；2，看这匹棕马正和一条狗一起奔跑呢
答
a.run running
can 后面必须跟动词原形
is running =现在进行时