We may find that learning a foreign language does not have to be________learning our mother tongue,but can in fact be twice ________.
Look! Some workers are busy building a monument, one ______ the national hero
Little John hardly got anything in________ for his kind act, ________ made him unhappy.
That hazy(雾霾)weather has hit 104 cities in middle-east China lately makes citizens well aware of ______a terrible problem China is faced with.
Seeing the coach nodding ________ to her, the little dancer was no more nervous and went on with her performance.
—Have you got any idea why Mother asks for me?—She wants you to________ your staying up last night.