Practice more, ________you'll lost the chance to take part in the competition.
A.or B.and C.so D.but
A lot of accidents happen because people are too________ in their everyday life.
A.careful B.careless C.awful D.useless
—I really like eating potato chips.Do you know ________they were invented?
—Actually,they were invented by mistake.
A.why B.when C.how D.whether
—________we hold a graduation party next Saturday?
—All right.That's a good idea.
A.May B.Must C.Will D.Shall
—Mike,take away your things. They ________ lot of space,
—OK. I will do it at once.
A.take off B.put out C.take up D.put away
—We________for school in ten minutes, Have you packed your school things yet, son?
—Of course,Mom.
A.leave B.have left C.will leave D.were leaving
