请给正确答案并说明原因.1."Do you regret__five hundred dollars for the p
请给正确答案并说明原因.
1."Do you regret__five hundred dollars for the painting?
"No.i would gladly have paid twice as much for it."
A paying B to pay
2.He regretted__to come earlier.
A.be unable B.being unable
3.John stopped__a cigar on his way home.
A lighting B to light