Some people are afraid that ______ air pollution may cause changes in weather around the world.
—Hi, Lucy. Your skirt is very nice. —____
---_____ are they? --- They are Maria and Jane.
中华人民共和国的英文缩写是______.
---_____they have a car? ----Yes, they _______.
下列字母中,含有相同音素的一组字母是_______.