Helen had to shout ____________ above the sound of the music.(本题1.0分) A、 making herself hear B、 to make herself hear C、 making herself heard D、 to make herself heard
参考答案:
Children brains cannot develop they lack protein(蛋
Children brains cannot develop they lack protein(蛋白质).(本题2.0分) A、 since B、 when