Years ago we didn’t know this, but recent science ______ that people who don’t sleep well soon get ill

Having lived in China for 8 years, Helen has a good _______ of both English and Chinese.

I thought I asked you to fix the radio– Oh, I’m sorry, MadamI _____ it right away

As we all know, houses can be sold at a high price which are _____ for schools, supermarkets, bus stations and hospitals.

_______ it is hot, our parents are still working hard outside.