In much of the animal world，night is the time________for sleep—pure and simple.
(2013·湖北，26)

According to the law，all foreigners have to________with the local police within two weeks of arrival.                                                       (2013·湖北，24)

He became the ________ of criticism by the readers for his newly­published book.

While she was in Paris，she developed a ________for fine art.         (2013·天津，7)

With inspiration from other food cultures，American food culture can take a________for the better.                                                            (2013·江苏，33)

I am always delighted when I receive an e­mail from you.________the party on July 1st，I shall be pleased to attend.                                              (2013·江苏，26)

I can’t say thank you ________ much.I couldn’t have succeeded without your help.

—Be careful not to drop the Ming Dynasty vase.
—Yes，we can’t be ________.

Thank god，you finally returned home ________.You can never imagine how I worried about you when I was told about the terrible accident.

—Leaving for Beijing?
—________.