Do you know when he back tomorrow?—Sorry, I don’t know. When he back, I will tell you.

When did your father_____ your mother?

________ my opinion, the school trip was veryinteresting.[ ]

..It was _______ he said that _______ me feeling frustrated.

According to my grandma, it is a good idea to eat chicken soup when you have a cold.— ________, scientists agree with her.