吗啡不具有下列哪项作用
A．兴奋平滑肌B．止咳C．腹泻D．呼吸抑制E．催吐和缩瞳
参考答案：C
The old man lives in the __________ house __________, but he doesn’t feel __________.[ ]
A. lonely; alone; lonely
B. lonely; lonely; alone
C. lonely; alone; alone
D. alone; alone; lonely
I'm tired out. I（）all afternoon and I don't seem to have finished anything.
A. shopped
B. have shopped
C. had shopped
D. have been shopping
