he has just bought a new house.he has been in it( ) a short time.a.since b.for c.about d.ago选哪个,为什么?
问题描述：
he has just bought a new house.he has been in it( ) a short time.a.since b.for c.about d.ago
选哪个,为什么?
答
B
完成时排除C D
since跟时间点 for跟一段时间
答
B
for a short time 有一点时间了,前面用现在完成时