There was a (a)   of buffalos on the field.

The balloon (a)   when it had too much air.

I (a)   my arm on the slide.

Molly was (a)   in line.

The (a)   took our money when we paid.

In math you have to complete your (a)   .

The girl had on a (a)   .

People used to (a)   butter a long time ago.

Molly was (a)   at math.