题干
With the loss of labor，the old farmers ________at home had to choose less laborintensive crops.
A：having left
B：to leave
C：left
D：leaving
答案(点此获取答案解析）
C
With the loss of labor，the old farmers ________at home had to choose less laborintensive crops.
A：having left
B：to leave
C：left
D：leaving
