When the expression first came into being, people refused to use it but _____ they began to accept it.
_____ according to the instructions, the robot can behave like a human being with average IQ.
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.