.To help today’s customers make a choice, a company in New York _____a video trolley — a supermarket trolley with a video screen to display advertisement and price information

parents do everything for uschildren, we will not learn to depend on ________.

See the flags on top of the building? That was we did this morning.

If you don’t know what their shortcoming are, your chances of overcoming them are very ______.

Tom didn’t come last night,did he?—No.I _______ have waited for him.A whole night was wasted.