There is_____ in the classroom, we can see_______.

Jack will arrive in Kunming tomorrow, and we are going to meet him at the airport.

I don’t know if he tomorrow. But if he, I’ll tell you.

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

I find ________ difficult to remember everything, though I’m still young.