53. In 1989, a(n) _______law was passed by the United Nations to stop people putting waste into sea.
—Can I use your laptop for a while?— ; anyhow I am not using it now.
Only after Helen moved to Australia ______ how important she was to me .
Spelling Bee is a contest competitors, usually children, are asked to spell as many words as possible.
We began to open to the outside world in the ate 1970s. , there have been great changes in the country.
Sun Yang, a young Chinese swimming talent, several gold medals before the 2012 London Olympics.