The children took a trip _____ the Great Wall last week. [ ]

Jack took music than any boy in his class and held a concert successfully.

People open their presents _____ Christmas Day. [ ]

One Friday, we were packing to leave for a weekend away _______ my daughter heard cries for help.

Can you tell me _____ the birdwatchers in Zhalong Nature Reserve? I only know that _____ of them are from our school.