Can you imagine the difficulty the teachers have _____ all the students go to college.

My mother told us_______ make__________noise.

the coach nodding ________ to her, thelittle dancer was no more nervous and went on with her performance.

This special school accepts all disabled students, ________educational level and background.[ ]

30．He added, “President Obama is going to do_____ he thinks is necessary to get our economy moving again.”