The first thing a student must have ____.a)been diligentb)is diligencec)to be diligentd)is diligent这题书上的答案是 d,可是我觉得应该是 b 为什麼是用形容词呢?还是书错了?

the first thing The first thing a dog should learn is_________ You know what the best thing is about the end of a day?- - - Tomorrow is st He joined the army on _ of May 1980.A.1 st B.the 1 C.first D.the first 英语填空1.Please pass me the book __ lies on the desk.2.The man __ you saw at the meeting is a well-known swimmer.3.The first thing ___ you must do is to have a rest.3,April 1st is the day __ is called April Fool‘s Day in the west.4.A nurse is 英语疑问,the first thing I do,etc是take a shower is the first thing I do 还是taking a shower is the first thing I do 还有,Anna and Mike are the ----(Green) children the first thing needed for innovation is a fascination with wonder.这个句子为什么用“needed for” .既然修饰“the first thing” 为什么不用“the first thing which needed for.” 用the first thing is造句 the whole thing first 怎么翻 when a boy fell into the water ,what's the first thing he did When is the American Labor Day?A.September 1st B.May 1st C.the first Monday in September D.the end first thing 英语 1st 表示的是first 还是the first?in the 1st centry英语 1st 表示的是first 还是the first?in the 1st centry还是in 1st centry? The first thing( )you must do is to make a full plan. But the first thing l want to do is to s____ a school The first thing needed for innovation is a fascination with wonder,什么意思 first genocide of the 21st century.翻译 The first thing ( ) we should do isto clean the room.