______ of his time ______ been spent on studies every day.

_____ does your party start?—_____ seven thirty.[ ]

You look worried. What’s the matter? —I _____ the exam yesterday.

I’m good ______ old people and I’m good ______ playing the guitar, so I can join you to help them.

I used to argue a lot with my parents, but now we_______ with each other.