Without good instructions of the teacher, you will be likely to___________ a lot of bad habits while you are practising the piano.
At the meeting they discussed three different_______to the study of mathematics。
He was chosen _________ of the company.
In the botanic garden we can find a(n)______of plants that range from tall trees to small flowers.
The experiment turned out to be ________, which wasn’t ______ they wanted.
She is in a poorof health, which worries her mother much.