________arriving in Tibet , the soldiers at once joined them ____their work.At; with B. On; in C. For; with D. After; to
I ________ fishing in winter, but I didn’t for the last two seasons.
The _________ in which the parents were separated from their children was really _______.
Is it the book that ________ people of all ages ______ became the best-seller last year?
The president _________ at the meeting, _________ by his secretary.
As a matter of fact, this is just as ________.