I tried phoning her office, but I couldn't ______ .
Hardly had we entered the room________ it began to rain.
—When did the computer crash?—This morning,while I ________ the reading materials downloaded from some websites.【选项
I was wandering through the street ________a beggar stopped me for some money.
You got second and Tim first in the race! How did Tim beat you?——________ ? Maybe he is just a lucky dog!
Laura’s knee pain ______ from such activities as running, hiking and horse riding.