It worried her a bit ______her hair was turning grey.
| A．while | B．if | C．that | D．for |
The FBI last night released pictures of two men __________ planting the bombs which brought great damage to the Boston Marathon.
| A．informed of | B．approved of | C．suspected of | D．reminded of |
By speeding up reforms the UN is trying to live up to the wishes of people around the world and __________ more to building world peace.
| A．contribute | B．link | C．expose | D．attend |
The new law of consumer rights also __________rules about returning faulty goods and sets out protections for those who receive poor services.
| A．announces | B．clarifies | C．consists | D．possesses |
A professor said the rise of the BRICS countries（金砖国家） is a/an _______ of the end of the world in the control of the USA.
A. barrier B. process C. aspect D. symptom
A new case study says Chinese companies face tough _____in the US and have a long way to go to be successful.
| A．challenges | B．campaigns | C．motivations | D．dilemmas |