China has recently been faced with serious issues of product safety. In Panama, it is said that medicine made with a poisonous chemical sickened some people. A Chinese company had identified it as diethylamide glycol （[化]乙二醇）, a low – cost substitute commonly used in automobile antifreeze（防冻剂）.
Some countries have banned Chinese-made toothpaste containing diethylamide glycol. China has now told companies to discontinue its use, even though it says the toothpaste is safe. Another industrial chemical, melamine, was found in wheat flour used to make pet food in North America. Thousands of dogs and cats became sick.
The United States has restricted some imports of Chinese seafood because they contained banned substance. And questions have been raised about other products, including children’s toys covered with lead paint.
Chinese officials promised to provide the European Union, the biggest trading partner, with detailed reports on enforcement efforts against unsafe goods.
Meglena Kuneva, commissioner (理事) for consumer protection of the European Union said China should have kept its promise.
China recently closed three companies linked to the Panama and the pet food scare. And it dismissed the former head of its food and drug administration. He was found guilty of corruption (腐败) for approving unsafe drugs. This week, a conference of the State Council approved a proposed special measure on the supervision of food safety. The Xinhua News Agency said it calls for stronger controls over producers, greater responsibilities for government and more serious punishment for illegal activities.
But Chinese officials have accused some foreign media of overstating problems with goods made in China. They say food imports from the United States also fail inspection sometimes. Next Week, American and Chinese food safety officials are planning to hold 5 days of meetings in Beijing to discuss cooperation.
How many cases with safety problems are mentioned in the passage?

A．Six

B．Five

C．Four

D．Three

How was Panama case dealt with afterwards?
A．Three companies linked to it were closed down.
B．The former head of food and drug administration was removed from his position.
C．More serious punishment was conducted for leaders linked to it.
D．Both A and B.
It can be implied but not clearly stated that ________.

A．Chinese- made toothpaste is safe

B．the safety of “made in China” is doubted

C．there are safety problems with one more Chinese products

D．stronger control over Chinese products is in need

The passage is mainly about ________.

A．China is facing product safety problems

B．more controls are taken of Chinese goods

C．overstated problems with Chinese goods

D．China is losing its trade partners

What does “it” refers to in the last but one paragraph?

A．China	B．The European Union
C．Chinese officials	D．The Chinese company