--- Catherine, will you visit us this weekend?--- I planned to, but something unexpected _____.
Nobody noticed how long the cat ____ under the table _____for dinner.
I saw an old man was standing at the corner, with a hat in his hand,____ handouts(施舍物)
All passengers _____ in the accident were sent to the nearby hospital in no time.
—If you go to the post office, would you please get me a stamp?--I am ___ willing to.
---Where has Mary been? I haven't seen her all day?---Oh,in order not to be disturbed, she spent the whole day __in the study, ___ her report.