题目内容：

    Instagram（图片分享社交应用程序）is about to take its biggest step toward removing likes from its platform. After months of testing an option to hide likes in select international markets, Instagram, which is owned by Facebook（FB）, has already been testing hiding likes in seven other countries, including Canada, Ireland and Australia. For years, likes have been central to how celebrities, brands, politicians and everyday users experience Instagram and Facebook. It's a way of measuring popularity and success. But in recent months, Instagram has been rethinking how likes contribute to making its platform more toxic. Now it's considering a change.

The total number of likes on posts — which appear as hearts on the app ——will disappear from Instagram's main feed, profile pages and permalink（永久链接）pages. The owner of the account can still see their own likes, but their followers won't know the count.

CNN Business previously spoke with users in countries with the test. The majority felt this move would improve well-being on the app. Instagram is the most detrimental（不利的，有害的）social networking app for young people's mental health, such as negatively impacting body image, according  to one study.

But other users and psychologists said hiding likes won't fix everything. The test doesn't address some of the key ways that activity on Instagram can impact the well-being of users, including bullying, feeling left out and thinking other people's lives are better than their own.

Renee Engeln, a psychology professor at Northwestern University, voiced his opinion that the biggest impact of Instagram is the content and the exposure to this constant stream of perfected images is what seems to hurt psychologically. Plus, users can still see their own likes ——and feel badly if their posts don't perform well.

1.How do users experience Instagram in this passage?

A.By giving likes. B.By hiding likes.

C.By selecting platforms. D.By showing off talents.

2.The underlined word “toxic” in Paragraph 1 most probably means “      ”.

A.profitable B.poisonous

C.popular D.positive

3.What can we infer from the passage?

A.Instagram has affected youngsters' mental health.

B.The account owners won't know the count o£ likes.

C.Instagram tested hiding likes in seven countries first.

D.The majority think Instagram has been a well-being app.

4.What could be the best title of the passage?

A.Instagram Misuses Likes

B.More People Are Against Likes

C.Likes Cause Mental Problems

D.Likes will Be Hidden on Instagram