Scientists doubt wheth er it ’s ________ to regulate one ’s biological clock by drinking.

_______ he goes, she will go, and she never cares _______ happens.

According to Maslow,self-actualization need excludes _______

______ are the primary destinations for the Chinese at present.

Tourist expenditures have different effects on a destination economy:sales by food vendors to restaurants are _______ effect;while taxi fares and airline ticket sales are _______ effect.

Which of the following statement is NOT true?

______ inns and taverns,in particular,gained a reputation for cleanliness and comfort and set the standard for accommodation in other parts of Europe.

Poor speaker of English though he was at the time, he still managed to make himself ________.

He shook hands with the visitors ________ as to convey his apology.

Which of the following country is not a member of OECD?