问题描述：
since then与什么时态连用
I bought my laptop last March and it ___me everywhere since then.
A follows B followed C is following D has followed
是B还是D
I bought my laptop last March and it ___me everywhere since then.
A follows B followed C is following D has followed
是B还是D
问题解答：
我来补答展开全文阅读