题目内容：

my sister (be) mpt here now .Maybe she (go) to the school library.she (been) y there for many times

优质解答

is (mpt--not）；现在不在此地
went/has gone; 过去动作或者用现在完成都应该可以,去了/已经去了
had been.国初曾经去过几次,用过去完成.