Tom’s mother is ill. Now she stays ______. [ ]

My father is strict ____me.[ ]

She had _______ got out of the house _______ it began to rain.

hat do you think of genetically modified food (转基因食品)? —We all think ______ is careless ______ some scientists to say it is safe before doing any experiment.

Our holiday in Beijing cost a lot of money.—Did it? Well, that doesn’t matter ______ you enjoyed yourselves