He was warned _______ he should make the same mistake again.

He was warned _______ he should make the same mistake again.
A、 if
B、 given
C、 lest
D、 unless
【正确答案】：C

上一篇： You will see to ________ the engine does not get out of order.

下一篇： When _______ at the door, she was given a warm welcome.