People can _______ running everywhere. Do you know what ______?A. be seen; happened B. be seen; is happening C. see; happens
_______ the heavy rain, many people were late for work. Because B. Because of C. As D.Since
Tom _________ in making a model plane. It was a _________.
The trip will take us ________ days.
—How ______ your holiday?—Not bad.
You’d better ________ your homework before you play games.