His lack of professional knowledge _______for the failure of the experiment.
| A．accounted | B．explained | C．counted | D．contributed |
The Smiths don’t usually like staying at________hotels，but last summer they spent a few days at a very nice hotel by________sea. (2012·江西，21)
| A．/；a | B．the；the |
| C．/；the | D．the；a |
He missed________gold in the high jump，but will get________second chance in the long jump. (2012·大纲全国Ⅱ，7)
| A．the；the | B．/；a |
| C．the；a | D．a；/ |
．The development of industry has been________gradual process throughout________human existence，from stone tools to modern technology. (2012·浙江，2)
| A．/；the | B．the；a |
| C．a；/ | D．a；a |
Carl is studying________food science at college and hopes to open up________meat processing factory of his own one day. (2012·安徽，21)
| A．/；a | B．/；the |
| C．the；a | D．the；the |
Sarah looked at ________ finished painting with ________ satisfaction.(2012·新课标全国，22)
| A．/；a | B．a；the |
| C．the；/ | D．the；a |