The monument was built in honor of the explorer who was believed _____ the river.
He was just about to give up hope,________a good idea came into his mind.
I was telling them about my tour ________she broke in with her own story about her visits to Beijing.
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.