When he is free, he often helps his parents ________ some housework.
The Chinese______ the first to use paper money, probably as early as the 11th century.
Jimmy has made up ______ mind to go to Oxford University for further study.
Do you have to wear______ uniform if you work at McDonald’s? A、A、 B、an C、the D、/
My father is ______his sixties, but he looks much younger.
Which of the following underlined parts is different in pronunciation from others?