The engineers had __ trying to solve the mechanical problems of the railway systemthe engineers had____trying to solve the mechanical problems of the railway systema such hard time b such a hard time c so hard time d a so hard time为什麼呢?

The engineers had __ trying to solve the mechanical problems of the railway systemthe engineers had____trying to solve the mechanical problems of the railway systema such hard time b such a hard time c so hard time d a so hard time为什麼呢? The engineers always arrive_the station early. 英语翻译The news that our team had won __us __ __. we have full access to the manufacturing engineers怎么翻译 what is the difference between civil and structural engineers? Why didn't the government want foreign engineers什么意思 Because engineers have reduced the lean by 50 centimetres. 不知以下四个答案哪个是对的.Over 60% of the engineers in this factory are ___________.A.man engineers B.men engineers C.woman engineers D.woman engineer应该选哪个,为什么? 1 aunt li asked me to take care of her little son while she was out=l was asked to __ __ aunt'sson while she was out2 lt took the workers and engineers about two years to build the tunnel=the works and engineers__about two years __the tunnel3 the rec the children sat at the table until the guests __.A.left B had left 在这些句子中的横线上应该填什么1.catch a plane to Britain=go to Britain __ __=__ to Britain2.study __ college3.The MacMahons had no idea what to do with him.=The MacMahons had no idea __ __ __ __ him.4.the history __ cinema.5.have sth._ Neither side had scored before the football match ended同义句:The football match___ up __ __ ___. The driver might have had an accident but that he __ the car suddenly.A braked B had braked The dumplings are very delicious.__ __ the dumpling are! I had no time dor lunch.I __ have__ time __ __ lunch.I didn't find my bag.My bag __ __.They sang in the park.They were happy.They __ __ __ in the park. 2 They had a walk along the lake,__(enjoy)the beautiful scenery. He have had lunch,__ __?(反问) Though he had a bad cold,the boy still went to school.(同义句）__ __ __ a bad cold,the boy still went to school. 英语翻译It will be __ in the afternoon.__ had better take an umbrella with you.根据意思补充句子