-- Mr Smith ,What shall we do next?

-- Let students ___________for discussion.

A．swept the floor

B．build the floor

C．open the floor

D．took the floor

解释下列加粗的词。

（1）于厅事之东北角，施八尺屏障：____________________

（2）便有妇人惊觉欠伸：____________________

（3）妇抚儿乳：____________________

（4）曳屋许许声：____________________

（5）两股战战，几欲先走：____________________