As a way of______ the mails while they were away, the Johnson's asked the cleaning lady to send little printed slips asking the senders to write again later.

单项选择题I'm very glad to know that my boss has generously agreed to______ my debt in return for certain service.

单项选择题Many people______ their lack of knowledge as soon as they start talking.

单项选择题The American dream is most______ during the periods of productivity and wealth generated by American capitalism.

单项选择题By referring to cable cosa nostra' deal (Line 4, Para. 5), the author indicates that______.

单项选择题According to the author, the word rubber-stamp (Line 7, Para. 1) means______.