单选题：I found _________difficult to work out the problem.[ ]A. i..

I find _____ important that we practice English every day.[ ]A. it B. this C. that D. what

is our hope that improve ments in health care will lead to a stronger, more prosperous economy.[ ]A. AsB. ThatC. ThisD. It

_______is our belief that improvements in health care will lead to a stronger, more prosperous economy. [ ]A. AsB. That C. ThisD. It

I hate ______when people talk with their mouths full of food.A. themB. thatC. itD. one

— Will you see to _____ that all the papers should be handed in after class?— All right. [ ]A. thisB. it C. meD. them