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每次焰色反應(yīng)實(shí)驗(yàn)都要用試劑洗凈鉑絲，這種試劑是……（）

A、Na₂CO₃溶液       B、NaOH溶液       C、硫酸       D、鹽酸

It’s high time you had your hair cut ; it’s getting _______ .

A. too much long       B. much too long

C. long too much       D. too long much

Jenny nearly missed the flight______ doing too much shopping. 

A. as a result of      B. on top of    C. in front of      D. in need of

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

下列化學(xué)反應(yīng)的離子方程式正確的是（   ）

A．在稀氨水中通入過量CO₂:NH₃·H₂O+CO₂=NH+HCO

B．少量SO₂通入Ca(ClO)₂溶液中：SO₂+H₂O+Ca²⁺+2ClO^-=CaSO₃+2HClO

C．用稀HNO₃溶液FeS固體：FeS+2H⁺=Fe²⁺+H₂S

D．氫氧化鈣溶液與等物質(zhì)的量的稀硫酸混合：Ca²⁺+OH^-+H⁺+SO=CaSO₄+H₂O

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

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

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

It’s high time you had your hair cut ; it’s getting _______ .

A. too much long       B. much too long

C. long too much       D. too long much

下列各組詞語中加點(diǎn)的字的讀音，與所給字音都相同的一組是

A．宏（hóng）  彩虹  弘揚(yáng)  鴻篇巨制  洪鐘大呂

B．鮮（xiān）  纖繩  秈米  白浪掀天  鮮為人知

C．繳（jiǎo） 剿除  剿襲  腳踏實(shí)地  矯枉過正

D．顫（chàn）   顫栗  懺悔  脅肩諂笑  饞涎欲滴