The police stillhaven’t found the lost child, but they’redoing all they____.[ ]

American Idol and China’s Got Talent have one thing_________common.

reported, it is 100 years________ Qinghua University was founded.

Who do you think can do the voluntary work—______ who is willing to help can do it.

30 The elephant I saw in the zoo ate _____ all the things the visitors gave it