The program is like a window on the world ____ you sit by it and fix your attention on what it shows.
_______was often the case, Miss Wang was the first to arrive at the school in the morning .
----Is Tony the student awarded at the graduation ceremony in your class? ----There is ______ Tony, but I’m afraid he isn’t ______ one you mentioned.
The child tiptoed quietly to the bird. ________ into the forest when he was about to catch it.
He ___________busy yesterday, or he __________you with your experiment.
He ________ to the cinema last night, for he stayed with me.