（题文）He had his camera ready ____________ he saw something that would make a good picture.

Be careful when you go ____ the streetbecause the trafficis very busy at the moment.

We had just covered a distance of three miles the engine and the car came to a stop

I’m determined to get a seat for the concert ________ it means standing in a queue all night.

She kept practicing ________ she could win the National Speaking Competition.