Whats the difference between an open and a closed syllable？

Whats the difference between "postal worker" and "postman" according to the passage？

A．The former is informal; the latter is formal.

B．The former is formal; the latter is informal.

C．They have the same usage.

D．Both of them are informal.

eview yet of the affordability of a healthy diet. "For many low-income families, an【C1】______$1.50 daily is quite a lot," says Mayuree Rao, "It【C2】______to about $550 more per year per person, and that could be a real【C3】______to healthy eating." Rao and her colleagues reached their【C4】______after analysing 27 studies from 10 high-income countries, comparing price【C5】______for healthy versus unhealthy ingredients and diets.【C6】______one study compared the cost of a diet rich in fruit and vegetables versus one that was【C7】______in them. Another compared prices of【C8】______healthy and less healthy items, such as wholegrain versus white bread. Individual items were【C9】______matched in price. Meats【C10】______the largest difference: healthier options cost an average of 29 cents per serving more than unhealthy options. 【C11】______this, comparisons of whole diets showed that healthier diets cost averagely $1.48 more per day. This shows that comparisons based on single ingredients dont tell the full【C12】______. "It tells us that,【C13】______, it doesnt cost more to eat healthier based on one nutrient," says Rao. "But theres growing evidence that the【C14】______of foods in your diet【C15】______your disease risk more than any single nutrient, so we think our【C16】______finding that healthier diets cost about $1.50 more has the most public health【C17】______." As to why healthier food has become more【C18】______Rao says that it may be because the food industry organizes itself and the types of food it produces to【C19】______its own economies of scale,【C20】______than whats best for consumers.

【C1】

A．available

B．adequate

C．extra

D．economical

Whats the attitude of the man toward the charity bazaar？

A．Indifferent.

B．Supportive.

C．Impersonal.

D．Surprised.

Whats the man doing？

A．Reading a newspaper.

B．Having dinner.

C．Cleaning the house.

D．Watching TV.

Whats the attitude of the writer towards the advice experts give？

A．Indifferent.

B．Sarcastic.

C．Skeptical.

D．Supportive.

Whats the attitude of the US toward the Sudans work permits issue？

A．Supportive.

B．Opponent.

C．Careless.

D．Neutral.

Whats the style. of the passage？

A．Sarcastic and humorous.

B．Literary and imaginative.

C．Factual and referential.

D．Poetic and beautiful.