对下列句子中加点的词语的解释，不正确的一项是（ ）

What do you think of his talk on the InformationTechnology—Oh, very good. It’s worth ______.

The role of Chinese Dama in the economy has been over-estimated by some western media ______ their “gold rush” has had little influence on gold prices

ildren went home from thegrammar school, their lessons ______ for the day

The discovery of the oil field, to the delight of the whole nation, will largely _______ the country’s dependence on imports of energy