Half of the workers here ________ under 30

字號(hào):


    問(wèn)題補(bǔ)充:?jiǎn)芜x題 Half of the workers here ________ under 30 ________.?
    A.is;years
    B.are;year old
    C.is;years old
    D.are;years of age
    答案:D