This maths problem is that one.
. (2010·江西名校模拟) —I’ve heard they went skiing in the mountains last winter. —It ______ true because there was so little snow there then.
The tomato juice left brown ____ on the front of my jacket.
Most of the professors _____ to our school were from South Africa.
—Alice, you look puzzled.Haven’t you understood it? —Yes.I _____of another problem just now.
By looking at a problem in as many ways as possible, creative thinkers can find solutions that would _______ remain invisible.