computer.—I don’t know,. Let’s go and ask our computer teacher for help.

ay find the key to the math problemon page 107.—Ah, it’s so simple. I wonder why I _____of that.

____the watch ___and see if something is wrong with it.[ ]

Tom, help me buy two tickets for this weekend’s concert online.—Sorry, there is no ticket _______ online now.

Measures must be taken to prevent pollution ________happily.