请帮我解释A和B!T^T

请帮我解释A和B!T^T He hasn't been here( )the morning of March 2nd.Auntil B since C on D in 我怎么感觉A和B都行啊帮我解释清楚啊.请说明为什么不选A.. You're Cynthia,.you?A,aren't.B.are.C.didn't.D.were请帮我找出正确答案和原因 We didn;t eat here last week,.we?A.didn't B.haven't C.do D.did请帮我选正确答案以及原因 请大家帮我看下这道题,并且麻烦和我解释下您的答案!谢谢—— We don’t have to clean the house _______.It isn’t dirty.—— OK, let’s clean the kitchen this time. A somewhere B anywhere C nowhere D everywhere 请大家帮我解释一道外语单选题I sent a wedding invitation to a friend,but unfortunately ____couldn't attend my wedding ceremony.A.who B.one C.she D.that last year he didn't （）any letter A、wrote B、writes C、write D、to write四个答案我都不是很明白请大家帮我解释选与不选的原因! Why.a movie tonight?A.about seeing B.don't we see C.not seeing D.we don't see请帮我选正确答案以及原因 请帮我看看这几个英语单词和其他三个不一样的?1 .A; caption 【中划线的是t】 B；catch【t】 C;television【t】 D；bottle【两个t】 与其他不一样的是（）2.A ;measure 【sure】 B;pleasure【sure】 C;pressure【 请英语好的朋友帮我看看 ,_________smoke here,please.A．Not B．No C．Don’t D．Isn’t 请帮我选择I can't lend you some money ,for I haven't got any __me.A.at B.in C.of D.with need实意动词和情态动词I am going to attend the conference,but you_____with me.A.needn't to go B.don't need go C.needn't go D.needn't going请帮我分析一下每个选项,越详细越好.谢谢! 帮我看一这个C语言程序有什么问题?目的是交换两个字符变量,老是编译不行,是新手,不太懂#includevoid main(){float a,b,t;printf(请输入a,b:);scanf(%lf,%lf,%lf,&a,&b,&t);t=a;a=b;b=t;printf(%lf,%lf ,a,b);} you ( ) be too careful when dealing with such a delicate matter.A.shouldn't b.can't c.won't d.oughtn't求答案和解释 谢谢! 请帮我解释下几道英文题 1.He worked ( ) and passed the exam.A.hardly B.hard C.harder D.hardest请问为什么不选A 2.句型转换 Didn't you see the car?(Haven't ) you ( seen ) the car ( yet 请问为什么该为yet的句子就不用 Don' It is _question that i can't work it out.A.a so difficult B.so a difficult C.so difficult a 请帮我 I .make new friends since i moved here.A.can't B.couldn't C.haven't been able to.D'm not able to请帮我选正确答案以及原因 you must be a writer,_____ you ? A.mustn't you B didn't you C don't you D must you请解释