So sudden ________that the enemy had no time to escape.

A. did the attack　　　 B.the attack did　　　　 C. was the attack　　　 D. the attack was

(1)等量蒸馏水　(2)等量的乳酸　(3)1号试管pH变化明显，pH明显上升；2、3号试管pH变化不明显　1号试管pH变化明显，pH明显下降；2、3号试管pH变化不明显　(4)蒸馏水不具有缓冲作用，为对照组；人工配制的缓冲溶液具有缓冲作用；动物血浆与缓冲溶液一样具有缓冲作用，说明其成分中含有缓冲物质

Beijing government puts more than 700 million yuan to increase its green space this year,____________ doubles the money provided last year.

A. as　　　　　 B. while　　　 C. that　　　　　 D. which

________ commits the crime shall be sentenced to ten years in prison.

A．Whichever　　　　　　　 B．Who　　

C．Whoever　　　　　　　　 D．Whatever

The red dress fits me ______ well, but it’s _____ expensive.

A. rather; fairly 　　 B. fairly; fairly　 　　C. fairly; rather　 　　 D. rather; rather

―How about the transplant operations?（ ）

―_______ on Tony, who gave one of his kidneys to his brothers, was harder.

A. The one　　 B. One　　　　 C. Which　　　 D. What

Don’t depend on him to do that , ______ he is a little child.

　 A.in all　 B.above all C.after all　 D.at all　

There are four basic _____ of blood in the human body. What do you belong to, A, B, AB or O?

　 A. kinds　 B. sorts　 C. types　 D. classes

It was raining hard, but none of us ________ working.

A. will stop　　 B. would stop

C. will be stopping D. has been stopping.

-- “Neal, listen,” she said, looking straight at him. “I ask you not to get_____ in this kind of matter.

-- It’s none of your business”.

　 A．caught　　　 B．involved　　 C．attached　　 D．connected