A．天冬酰胺 B．磷酸核糖C．甘氨酸 D．谷氨酸 上述物质中作为合成IMP和UMP共同原料的是

Over the past decade one primary function of the World Bank has been ______.

A．to improve world wide lending policies

B．to provide loans for poor developing nations

C．to finance the infrastructure construction in the developing country

D．to play a decisive role in international banking

Why do summer schools arrange visits and other activities for the students？

A．To attract more students.

B．To make the courses suitable for students of all levels.

C．To let the students have a good rest.

D．To help everyone to make new friends, have fun and improve their English.

The writer's purpose in writing this passage is ______.

A．to offer suggestion on how to make students' money safe

B．to tell students what to do with their money

C．to attract students to deposit money in the bank

D．to advise students to put money in bank for safekeeping

A．To welcome the tourists.

B．To make money.

C．To keep the tourists away.

D．To attract the tourists.

A．To save money.

B．To avoid the new tax.

C．To be more creative.

D．To attract more audiences.

A．To bring electricity into his house for lighting.

B．To have fun.

C．To attract thunder.

D．To conduct a scientific experiment.

A．to increase manager effectiveness in organizations

B．to help organizations attract top quality employees

C．to expand organizations’ consulting needs

D．to improve retention of quality workers

A．To welcome the tourists.

B．To make money.

C．To keep the tourists away.

D．To attract the tourists.

A．To improve the diets of hens

B．To move chickens into large farms

C．To make chickens sleep before they are killed

D．To improve chickens' lives

The primary goal of TFA is

A．to get more high-quality teachers.

B．to help struggling state schools in poor areas.

C．to attract the future leaders to education.

D．to improve the low-income communities.