侵蚀性葡萄胎行清宫术时，下列哪项处理是不正确的

A．一旦确诊后应及时清宫

B．一般采用吸宫术

C．首先应选择小号吸管至大号吸管

D．子宫缩小后可慎重刮宫

E．刮出物送组织学检查

You were _______ to take your shoes off when you entered the school lab, but you didn’t.

A．invited

B．supposed

C．selected

D．approved