What are on show in the museum? -Some photos _____by the children of Yushu, Qinghai.

Tom, do you know if Sam ________to my party next week?—I think she will come if she________ free.

―I think it’s too late to apologize to Kate.―Never mind. _______.

Our English teacher often stands _____ front of the classroom. [ ]

What do you like to do _____ such a windy day?..[ ]