After Chang’e-3 landed on the moon on Dec 14, China became the third country _________ this after the US and the former Soviet Union.
. -- Jack _______ for work in the downtown. What was the matter? -- _______, but he had no luck.
What __ public is concerned about is whether the scientists win be able to find _____ cram for the disease.
President Obama is letting Congress write the details of his plan for ________ he calls health insurance reform.
Now everyone is concerned about how to conquer the economic crisis _______ is very important for us to be able to preserve our standard of living.
. --What made your father throw up last night? -- I think the large quantities of wine _________.