The dress is made of silk．It _________．
A．is felt smooth B．is felt smoothly C．feels smooth D．feels smoothly
—May I use your computer, Mr. WU? —______．
A．Yes, you may not B．No, you may
C．Yes I may D．No, you may not
This dress still looks pretty on you, _______ it is out of style．
A．but B．though C．since D．Unless
— Is Lily good at singing? —Yes , she is．We often hear her_______ in the next room．
A．sing B．to sing C．sang D．Sings
— Will you go to Sandy’s birthday party? — I won’t go unless Tony______．
A．was invited B．has invited
C．is invited D．will be invited
—_____will you stay here? —Until tomorrow afternoon．
A．How long B．How soon
C．When D．How often
