【小题1】The young in our society need care and _________ (protect).
【小题2】_________ (pollute) water is a great danger to people’s health.
【小题3】He _________ (write) 10 books so far.
【小题4】There used to _________ (be) a big tree near the house.
【小题5】My birthday party _________ (hold) in two weeks.
【小题6】Do you mind my _________(sit ) here