As the busiest woman in Norton,she made_________her duty to look after all the other people’s affairs in that town.
Life in the oceans ranges from the tiniest plankton ______ up to giants like sharks and whales.
The 2008 Olympics has already ______China's great economic progress,
In the end, she _____________for the future.
---- Water can dissolve almost anything and give nutrients to creatures. ---- Yes, and that’s one of its __________.
The student couldn’t _________what the teacher was trying to explain.