Today the energy problem becomes critical. It ____ an immediate solution.A calls on B

The problem that the population becomes aging ______ .A．is exceptional to GermanyB．has bec

The water gives up energy and becomes cooler____________the ice receives energy and m

Which statement is true？A．US may not become the primary, direct consumer of the energy fro

Funding public transit is one of the biggest problems facing cities today. Often the tro

Homeschooling is reportedly on the rise today in China, as parents are becoming increasing

I’m tired. I havent ’t got_____ energy（精力)to go to the gym today.A.enoughB.manyC.littl