It was on October 1st _____ new China was founded.

Jim said the book ____ very interesting.

I want to go to the party, but ______I ought to be studying[ ]

Jack, you seem to be _______.—Yes. It’s 8: 20now and my train leaves in tenminutes.

.It was in the 1990s _______ we were working together ____ we made friends with each other.