Can we find before an earthquake?—-Yes. Some animals will run wildly and some plants will come out in the wrong season.

do you go to visit your grandpa?—Once or twice in a week.[ ]

I often go to school_____foot, but I had to go to school_____taxi yesterday because of rain.[ ]

The poor monkeys got ill ________ the bad food people fed it.[ ]

It was there, the police believe, _________ she was able to activate the recorder she kept in her bag.