某人因炎症造成下肢静脉内出现大量血栓血凝块，如果血栓脱落后在血液中移动，最终可能停留在 [ ]
A．脑
B．上肢
C．肾
D．肺
D
—I don't see you at the meeting yesterday. Why?
—I ____ for a long distance call then from my daughter in Canada. [ ]
A. waited
B. am waiting
C. was waiting
D. will wait
用以指明动作应完成的结束姿势时用（）表示。
A.接
B.经
C.依次
D.成
