下列离子方程式正确的是（   ）

A．用惰性电极电解饱和氯化钠溶液：2Cl^- + 2H⁺ H₂↑+ Cl₂↑

B．用银氨溶液检验乙醛中的醛基：

   CH₃CHO +2Ag(NH₃)₂⁺ + 2OH^-CH₃COO^- + NH₄⁺ +3NH₃ + 2Ag↓+ H₂O

C．苯酚钠溶液中通入少量CO₂：CO₂ + H₂O + 2C₆H₅O^- 2C₆H₅OH + 2CO₃^2-

D．Na₂SO₃溶液使酸性KMnO₄溶液褪色：5SO₃^2- + 6H⁺ + 2MnO₄^- == 5SO₄^2- + 2Mn²⁺ 3H₂O

They use computers to keep the traffic _______ smoothly. 

A. being run       B. run         C. to run        D. running

Progress______ so far very good and we are sure that the work will be finished on time.

A. was       B. had been    C. has been    D. will be

The children loved their day trip, and they enjoyed the horse ride ______.

A. most       B. more     C. less         D. little

—— Do you mind my opening the window? It’s a bit hot in here. 

    —— ______ , as a matter of fact

A. Go ahead      B. Yes, my pleasure

C. Yes, I do      D. Come on

I’m sure that your letter will get______ attention. They know you’re waiting for the reply.

 A. continued   B. immediate   C. careful   D. general

It is often ______ that human beings are naturally equipped to speak.

A. said       B. to say     C. saying     D. being said

下列词语中加点的字，读音没有错误的一组是

A．肖（xiào）像   伛偻（lóu）    忐（tǎn）忑不安

B．渊薮（sǒu）    不韪（wěi）    良莠（yǒu）不齐

C．曝（bào）光    肄（sì）业     越俎代庖（páo）

D．思忖（cǔn）    吮（shǔn）吸    锐不可当（dǎng）

下列词语中的读音，不完全正确的一组是

A.埋（mái）怨  脑髓（suǐ）  骈（pián）体  敛声屏（bǐng）气

B.处（chǔ）方  切（qiè）脉  空（kòng）白  钟鼓馔（zhuàn）玉

C.救济（jì）  福祉（zhǐ）  混沌（dùn）  风尘仆（pú）仆         

D.窥（kuī）视  肤（fū）浅  诤（zhèng）友  妍媸（chī）毕露

下列词语中加点的字的读音，全都不相同的一组是

A．喇叭  辣手  竦立  毛骨悚然  不速之客    B．禅宗  邯郸  不惮  殚精竭虑  箪食壶浆

C．茧绸  浑浊  蛰伏  风烛残年  风雪不蚀    D．憧憬  瞳孔  潼关  招摇撞骗  灯影幢幢