A．have doubledB．has doubledC．are doubledD．were doubledT……

单项选择题The manager needs an assistant who he can ______ to take care of problems in his absence.

单项选择题The stock ______ in value should be sold.

单项选择题______, I wrote a letter to Henry Ford Ⅱ and told him what happened.

单项选择题He was a person who would stand up for what he thought right, ______.

单项选择题You can't be ______ careful in making the decision as it was such a critical case.

单项选择题Problems common to most countries include the social, economic ______ problems.

单项选择题These excursions will give you an even deeper ______ into our language and culture.

单项选择题He is ______ of a musician.

单项选择题He came all the way to China for promoting friendship ______ for making money.