It’s really a great pity that all of you ____ leave so soon. It’s been pretty nice having you all at my birthday party.

I’m going to Europe on vacation together with John if I _______ find the money.

----Will Barbara come to our party? ----I am not sure, because he ____ go to the concert with his friend.

Miss Cooper ________ be here. I saw her come in.

As students, we ________ study hard to make our country more beautiful and stronger.