David is good ______ English, but he doesn't do well ______ PＥ.

单项选择题After the United States government reported ______ consumer demands for gasoline, market oil prices closed at $72 a barrel.

单项选择题Fields Bank offered credit lines of up to $10,000 at ______ interest rates to attract more small business owners.

单项选择题Would you please ______ the new words for us

单项选择题Cornwall Research Facility in Salem primarily focuses on lung cancer research ______ treatment.

单项选择题—What's in the ______ —There are some ______ and ______ in them.