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用所给词的适当形式填空。 1. When she couldn't find her mother, she ______ (begin) to cry. 2. —When did the movie ______(begin)? —It _____ (begin) about ten minutes ago. 3. At the ______ (begin) of this term, we have two new ______ (woman) teachers. 4. How many _______ (wheel) does a bike have ? 5. He always _____ (use) this pen to write.