—Can you help me with the math problem, Dad? ___________.—OK, let me think it over.
The door _____ open, no matter how hard she pushes.
When I first met Doris I didn’t like her, but I ______ my mind.
An air crash accident happened to the plane, ______.
I wondered what difficulty he had _____ the plan.
Jack has been working hard and _____ is no doubt that he will do a good job in the entrance exam.