单项选择题What advice was given by Professor Watson7
单项选择题The languages of the so-called undeveloped or uncivilized groups fall behind the Western languages in______.
单项选择题A coronary bypass is an operation______.
单项选择题What’s the speaker’s impression of the advertisement in America when he first arrived there
单项选择题A.survivedB.sunkC.damagedD.built