The coat was not made ______animal fur. I’ll take it.[ ]

Is this the first time you _____Chengdu ?—-No. But the first time I _____here, the city wasn’t so beautiful.

The boy is ______to go to school..

What do you think of Jane? —She is to be a good teacher.

Who’s that boy reading in the garden? Is it David?— It ____________ be David. I saw him in the classroom just now．