英语时态填空Tim didn't know that Mary's father ______(be) an engin

英语时态填空
Tim didn't know that Mary's father ______(be) an engineer.
we know this passage quite well,because our teacher________(ex-plain)it to us.
the play______(run)for a month and all the people like it very much.
mr wang said that he______(be)in charge of our class the next semester.
this time yesterday our teacher _______(sell)well.
many new buildings________(go)up on the huangpu river.
lingling_______(take up)teaching after graduating from the uni-versity.