Tom is a promising student. I am sure that withhis________effort, he will make a very successful scientist.

This special school accepts alldisabled students, ________ educational level and background[ ]

I phoned you at 9 this morning but got noanswer—I am sorry I _____ the bell I _____ inthe garden

Our school had about 20 notebook computers but only one-forth_____used regularly. Now we have 50 working all day long.

why can’t I work the maths problem out—Oh, let me seeWell, you ________ a figure here Got it