问题
选择题
In the busiest season the peasants were seen ___ their tractors ___from morning till night.
A．have, work
B．have, working
C．to have, working
D．to have, be worked
答案
答案：C
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In the busiest season the peasants were seen ___ their tractors ___from morning till night.
A．have, work
B．have, working
C．to have, working
D．to have, be worked
答案：C
