She smiled happily,________ a set of amazing white teeth to us.
The nutrients in ________ falls into the ocean quickly become available to other living things.
AIDs is a disease that _______ the body”s immune system. A breaks out B. breaks into C. breaks down D. breaks up
Word came ________ the present would be shown around Zunyi.
______ quickly, _______ you won’t be able to catch the train.
Mr. Green didn’t understand ________ made his daughter so absent-minded this morning.