【题目】We usually have lunch __________ 12 o'clock at school.

【题目】I'm sorry I didn't call you. I didn't find ____________ phone number.

【题目】我很善良并且乐于帮助其他人。

【题目】当你们去攀岩时，你们一定要小心落石。

【题目】今晚,能来宣布本次摄影大赛的获奖名单我非常高兴。

【题目】她忘记了那天为什么对我微笑。

【题目】他们戴特制的帽子避开苍蝇。

【题目】— How soon shall we leave the airport?—We won't leave ________ we make sure that everything is OK.

【题目】You may do it by yourself, ________ ask someone else for help.

【题目】Remember to keep in touch with your teachers and classmates ________ graduation.