根据句意和汉语提示，填写恰当的短语完成下列句子。
1. I hope you can come back___________ (尽快地).
2. All the teachers ____________(乐意帮助) students to solve their problems.
3. We should ___________(坚持) our dreams and try to achieve them.
4. ____________(数以千计的) students were surveyed about their favorite foods.
5. My sister _____________(梦想) becoming a singer. She likes singing very much.
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