_important_part_in_the_international_communication. (3)利用连词so升级1中的句④
It_is_certain_that_most_scientific_achievements_are_in_English_so_it_is_necessary_to_learn_English_well. 3．衔接成美文 (注意利用适当的过渡衔接词汇：in fact，therefore) Aside from Britain，the USA and Australia also have made great contributions to the development of English.In fact，though their English differs from each other，they can't be mistaken.English is one of the official languages in many countries，which plays an important part in the international communication.It is certain that most scientific achievements are in English so it is necessary to learn English well.Many websites are in English.Therefore，it is convenient to learn it now.
