55. I can’t see John anywhere. Where _____ he have gone?
Before driving into the city, you are required to get your car ____.
I looked up and noticed a snake ______ its way up the tree to catch its breakfast.
Tom took a taxi to the airport, only _____ his plane high up in the sky.
(2012辽宁卷)The old couple often take a walk after supper in the park with their pet dog them.
(2012辽宁卷)This machine is very easy . Anybody can learn to use it in a few minutes.