题目内容：

    For those concerned about wrinkles（皱纹）in the skin, it might be a solution: a newly-invented “second skin” that can make aged skin look more youthful.

The wearable film（薄膜）developed at Massachusetts Institute of Technology (（MIT）) has shown promise in a series of experiments where it was used to wrinkles, under-eye- bags and dry skin.

When used to the face or body, the thin film reduced the appearance of wrinkles and under-eye bags, and helped keep moisture （水分）in dry skin, thus making the skin look like younger.

It is designed to be applied in the morning and removed at night. The "second skin” remained unharmed against normal daily wear, and the stresses of exercise and swimming, without falling off.

“You can rub it from the comer and remove it. But it doesn't do that under normal daily wear. We don't want something that falls off," an MIT researcher said.

While normal make-up can cover imperfection on the skin, the new coating changes the way skin behaves by giving it the moisture of young skin. It was developed with help from two companies: Living Proof a make-up firm, and Olivo Labs, a medical company. With more work, they believe the “second skin"' will be used to cover birthmarks, to protect the face from UV rays, or to treat skin diseases or wounds.

The most impressive results came when the researchers used the film to under-eye bags. By pressing the loose skin, the film improved the appearance of the under-eye bags to a level that had only been achieved before with operations.

1.How does the “second skin" make people look younger?

A.By removing make-up on the skin. B.By helping the old skin fall off.

C.By making the skin less dry. D.By protecting the face from the sun.

2.What is the most effective function of the “second skin”?

A.To mask birthmarks. B.To treat skin diseases.

C.To protect wounds. D.To better the under-eye bags.

3.We can learn from the passage that      .

A.people can wear the "second skin” on rainy days.

B.the "second skin" has been used to treat wounds.

C.the "second skin" is designed to fall off by itself at night.

D.two medical companies helped develop the "second skin".

4.Where does this passage probably come from?

A.A news report. B.A science magazine.

C.A travel journal. D.A make-up advertisement.