Question

They were determined to carry out the plan at first, but then we ________ persua

They were determined to carry out the plan at first, but then we ________ persuade them to change their minds.
A. would
B. could
C. were able to
D. had to

Answer 1

答案C
考查be able to用法。Be able to do sth表示经过努力做成某事。句意：起初他们决定执行那个计划，但是后来，我们说服了他们改变了主意。