问题
选择题
--- May I go now?
--- No. You ______________ let the teacher know first.”
A．need
B．must
C．can
D．may
答案
答案：B
根据上文的问句内容，可知需要用情态动词，must，故选答案为B
搜题请搜索小程序“爱下问搜题”
--- May I go now?
--- No. You ______________ let the teacher know first.”
A．need
B．must
C．can
D．may
答案：B
根据上文的问句内容，可知需要用情态动词，must，故选答案为B
金属烤瓷冠修复，颜色透明性较差，外形立体感不强。
远中切角崩瓷。
唇侧位，深覆盖。患者否认曾经咬硬物。