Since then, finding ways to grow more peanuts his life goal.A. has beenB. wereC. wasD. h

发布时间：2020-08-16 22:31:06

Since then, finding ways to grow more peanuts      his life goal.
A. has been
B. were
C. was
D. have been

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(答案→)A. has been
B. were
C. was
D. have been
解析：本题考查时态。since then,since,ever since都和现在完成时式连用，题中用动名词做主语，谓语动词应用单数形式，所以选A。
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