-Hi,Mary. -Hi,Lucy. I ------- you are here. A.didn't know B.don't know

问题描述:

-Hi,Mary. -Hi,Lucy. I ------- you are here. A.didn't know B.don't know

B能给点解释么~~我也是犹豫不定的~如果选A的话,后面are要变成过去式were~~~~~~~~~~~~~~~~~~~希望对你有所帮助,望采纳~~~~~~~~~~~~~~~~~