1Deversince 后面的从句用一般过去时
2Bbut 连接的是两个并列的分句 ,所以but 前后连接的两个句子的时态应该一致,所以选B 用过去时的被动语态
3A句子的主语应该是the letter"u" 所以谓语动词要用单数 选B
1.Ever since Dolly,the sheep ___in 1997,many scientists have been working on cloning a human being.
1.Ever since Dolly,the sheep ___in 1997,many scientists have been working on cloning a human being.
A had cloned B has been cloned Cwould cloned D was cloned
2.The theory ___ about in 1514,but the csirntist only published it just defore his death in 1543.
Ahad put forward Bwas put forward
3.In American English,the letter"u" in some words,such as colour,___
Ais dropped Bare dropped
正确答案是D B A 但理由是什么？
A had cloned B has been cloned Cwould cloned D was cloned
2.The theory ___ about in 1514,but the csirntist only published it just defore his death in 1543.
Ahad put forward Bwas put forward
3.In American English,the letter"u" in some words,such as colour,___
Ais dropped Bare dropped
正确答案是D B A 但理由是什么？
英语人气：857 ℃时间：2019-10-27 12:01:41
优质解答
我来回答
类似推荐
猜你喜欢
- 1用现在完成时造几个简单的句子
- 2Please wait for a moment.I have （ ）to tell you
- 3写出几个相近的词.表示"说":询问（ ）（ ）（ ）表示“听”：耳闻（ ）（ ）（ ）
- 4用弹簧测力计拉着重10n的物体在水平桌面上做匀速运动,弹簧测力计的示数为2.4n若将拉力增大到2.8n,木块受到的滑动摩擦力为( )；若弹簧测力计拉着木块以较大的速度在水平桌面上做匀速直线运动,则弹簧测力计的示数为（ ）
- 5史记中“神农氏世衰” “衰”的读音
- 6（2011•郑州三模）已知定义域为R的函数f（x）在区间（4，+∞）上为减函数，且函数y=f（x+4）为偶函数，则（ ） A.f（2）＞f（3） B.f（2）＞f（5） C.f（3）＞f（5） D.f（3）＞f（6）
- 7解方程; (1) (2x+1)/(x²+x)=5/(6x+6) (2) 3/2-1/(3x-1)=5/(6x-2)
- 81 1+3 1+3+5 1+3+5+7 1+3+5+7+9 可以归纳出一个含有自然数n的等式,你所归纳出的等式是——
- 9Linda is very friendly.You can get along well with hei(合并成一句)
- 10一根木料长6米,截去三分之一后又截去了二分之一米,这跟木料还剩多少米