—Sandy, your mobile phone is ringing.
—Wait a moment 1 It's dangerous ________ it while crossing the street.
A.answer B.to answer C.answering D.answers
—Do you have any plans for the coming summer holidays?
—I ________ take part in some volunteering activities. I haven't decided
A.need B.may C.must D.could
Modern science has found that ________ one is using chopsticks, over 30 joints and over 50 muscles(肌肉)are used.
A.while B.since C.although D.unless
一I can't afford the red shoes. 一What about the black pair? The price is a little ________ .
A.cheaper B.lower C.higher D.more expensive
—What time does the first train to Beijing leave? —Wait a minute. I'm just ________ .
A.taking up B.picking up C.making up D.looking up
You need to make a ________ by next week, to go to university at home or go abroad. You are going on eighteen.
A.difference B.decision C.movement D.suggestion
