the brown horse can ____1___very fast.look it's____2____with a dog a.run running b.runs,running
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
a.run running
can 后面必须跟动词原形
is running =现在进行时