______his number for an hour only to hear a busy signal, she became impatient and called the operator for assistance.
A．Dialing
B．Dialed
C．Having dialed
D．To dial

未分类题Not only______tolerant of other peoples opinion, but he is also patient.A．he isB．is heC．he will beD．will he be

未分类题There must have been someone who had informed the owner of the bathing center of the sudden crack-down or he______able to escape the sweep.A．wouldn't beB．wouldn't have beenC．might have beenD．needn't have been

未分类题The national parks are very important for preserving many animals, who would ______run the risk of becoming distinct.A．insteadB．neverthelessC．thereforeD．otherwise

未分类题Some people may have been daunted by the task because of the difficulties it brings, but I do not know of______.A．them doing soB．any having done soC．their doing like thatD．any doing that way

未分类题______as it was at such a time, his medical work attracted much attention.A．Being publishedB．PublishedC．PublishingD．To be published