After a few courses on painting, Helen said she would ________ oil painting in her spare time.
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.
It won’t be long before we _____________ a way to overcome the difficulties.
Whenthe future, many people will imagine a lifehigh-tech devices.