One way to ______ species under threat of extinction is to remove them to zoos and parks and feed them there.
—Serina has been watching the TV series the whole night.— ________.
The reporters of all the leading newspapers ________ the trade talks between China and the United States.
He wants to have ________ third cake,because ________ second one is too small.
A friend of mine will go to France________Hong Kong,and we agree to contact each other________email.
It is reported that 40 percent of the land in Brazil________covered with trees.