My friends all know how to my little cat .

My seven-year-old daughter has a great interest in music and _______ Piano classes twice a week over the last three years

This summer North China was attacked by such a terrible heat few people has ever experienced before.

So far we have done a lot to build a low-carbon economy, but it is _______ ideal. We have to work still harder.

I___________ frustrated when I wasn’t sure of the correct answer.