He invited me to a dance after the show____ Christmas Eve.
A. at B. on C. in D. by
Most Americans would prefer to keep their problems themselves, and solve their problems ______ themselves.
A. to; by B. by; to C. for; to D. in; on
1.春天，山上开满了美丽的野花。 (grow)
2.参加体育活动是劳逸结合的重要方式之一。(balance n.)
3.据说中国将在医疗(medical care)方面有重大的改革。(report)
4.这项研究成果将极大地有利于沙漠地区的农业发展。(benefit)
5.他没能抓住这篇文章的主旨大意。(fail)
school and university, many students choose to spend their several months on crash course in English after graduation from middle school.
A. During B. In between C. Through D. Over
A WHO study finds half of all deaths in Africa are children，and people _________ age 60 make ____________half of all deaths around the world.
A. under; up B. below; of C. at；for D. under; into
_____ the help of our teachers, we ______ the problem.
A Under; took no trouble in solving B In; had no trouble at solving
C On; kept no troubles to solve D With; had no difficulty solving
