completed a study on the effects of television on children中为何on the effects 介词要用on ,用about 可以吗

completed a study on the effects of television on children中为何on the effects 介词要用on ,用about 可以吗 after he completed his maths work,he went on A.to write B.writing when ____,the library will be open to the public on 2013.A completed B to be completed 为什么是A,不能是B. completed 英语翻译Mingming had been a bad child when he was in primary school.He didn't study hard,often slept on class and never completed his homework.His teacher had criticized him for many times but he gave no care.Apart from this,he also liked bullyin 急等!请问是 study in a program 还是 study on a program? When will the railway --?A.complete B.completed c.be completed D.to be completed they shared tools to work on partially completed projects翻译around 25 people gathered around a common area talking while they shared tools to work on partially completed projects后半句完整么 He gave us a t___ on how to study English is there a study on the second floor? A Tentative Study on Translating Strategies Of Tourism English 英语翻译Study ConclusionsOnly recently have stakeholders been consulted in the design and implementation of projects.Review of 7 on-going and completed and planned projects showed that stakeholders consider the inclusion of their viewpoints absol “study on ones on your study a study study on和study about区别 Completed.Turn the Power off and on again. Whether the work can be completed on time is doubtful..