给加横线字选择正确读音，用“√”标出。

骤降(zòu zhòu)         犯罪(zuì zhuì)         劝说(quàn chuàn)        拉弦(xuán xián) 

教诲(huì huǐ)            假若(rò ruò)            嫉妒(jí jì)                    双肘(zhǒu cùn)        

承认(chén chéng)     稚拙(zhuó zhuō)       瞬间(xùn shùn)           蔬菜(shū sū) 

估计(gū gǔ)             角色(jiǎo jué)            黎明( lí ní)                 喘气(chuǎi chuǎn)

She knows a lot about the film. She must have seen it before, ______ ?

must she            B. mustn’t she     C. has she      D. hasn’t she