t comes to the human tendency to use the righthand much more often than the left hand, we seem to have __________ it from ouranimal ancestors, namely monkeys and chimpanzees.

I don’t know _______ .

Sorry, I don’t know what the teacher said just now.—-He asked Maria ________.

— Would you like to go travelling with me to New York, Benjamin?— Sorry, I’m busy, for the final examination is coming. So I ___ hard throughout the next several weeks.[ ]

ifficult the task may be, wewill try our best to complete it in time.