【题目】They must have known each other for a long time, __________?

【题目】Is a human brain a __________ powerful calculator __________ a computer?

【题目】Some students of Class Five __________ the project by the end of last year.

【题目】—Where is our English teacher, Lucy?

【题目】__________ is more important, gas or electricity?

【题目】Never content __________ with book knowledge only.

【题目】Would you like to go swimming with us __________ nine o’clock this Sunday?

【题目】Excuse me, can you tell me __________ way to the Oriental Pearl TV Tower?

【题目】She has three children. Her ________ son has just started school.

【题目】May has no idea ________ to finish so many tasks in such a short time.