The retired engineer plunked down $50,100 in cash for a midsize Mercedes as a present for his wife—a purchase（）with money made in the stock the week before.

单项选择题I hope that you’ll be more careful in typing the letter. Don’t（）anything.

A. lack
B. withdraw
C. omit
D. leak

单项选择题She has（）some brilliant scheme to double her income.

A. come out
B. come up with
C. come to
D. come about