Allen followed his customer across the yard and stood on the step of the house,        two shopping bags. 

---________by the chemistry teacher for not finishing homework independently makes him feel very shameful.---Yes. But he told me this morning he would spare no efforts to be the top one in our class.

Shanghai is the first city in the world _____________ a high-speed maglev train，from the city to Pudong Airport．

.This isn’t the most difficult one of the new words that ______ me in the passage.

    to their own work ,most of the parents spend little time with their children.