The president ordered that no time should be lost, and directed one of his high officials to __________ the matter in person.
—What about 100 yuan? That’s my final offer.—_______ I sell it to you just at the cost price this time for your future visit to my shop.
—Will you go to Mary’s wedding party tonight?—I’m afraid not. I _______ my brother’s.
Lacking _______ evidence, the police couldn’t arrest the man.
A kind passenger paid for my ticket, without which I _______ the last train.
—I have done well in the exam because of no careless mistakes.—Congratulations! Students can never be _______ careful in exams.