he is working hard for fear that he_______.a.should fall behind b.fell behind c.may fall behind d.falls behind为什么选a?是不是should就表示将来时呢?怎么用法,

He is working hard people 对working he is hard working.与he is hard he is very hard working and she is poite. he is a hard-working student hard-working做什么成分 be working hard He is working hard on a business master degree he is hard -working 改成用how感叹句 ____(get) good grades,he is working hard. He is also very brave and hard - working. he is working hard ----(be) the top student越快越好 He is more hard-working than me.的同义句 Andy is very hard working.he works from( )to( ) He is a hard working boy.He'll have a bright p__ future. He is a hard-working student,_____ who will be successful in whatever career he chooses. Li lei is very polite,and his is very hard working.同义句 Li Lei is very polite.___ ,he is very hard-working She is very hard-working,-----he is rery lazy.这个空为什么是while而不是when? 翻译 Robert is a clever boy and he is also a hard～working student. Mike is ________ to catch up with others.How hard-working he is! Though hs is old,but he is still working hard 有什么错误?