641.________ the right kind of training,these teenage soccer players may one day grow to be the international stars.
A.Giving
B.Having given
C.To give
D.Given
642.Schools across China are expected to hire 50,000 college graduates this year as short-term teachers,almost three times the number hired last year,_________ reduce unemployment pressures.
A.help
B.to have helped
C.to help
D.having helped
641.答案是D;句中主语these teenage soccer players与give之间是被动关系，故用过去分词作条件状语。
642.答案是C;动词不定式to help作目的状语。
