4 . According to________US First Lady Michelle Obama，China is the fifth most popular destination for Americans studying abroad.

5 . The next step in exploring ________ outer space might be sending people there in ________ spaceship.

A．不填; a

B．不填; 不填

C．the; 不填

D．the; the

6 . —Have you moved into_____   new office?
—No, the building is under _____ construction.

A．a; the

B．the; /

C．/；the

D．/；/

7 . 假定英语课上老师要求同学们交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。
删除：把多余的词用斜线(\)划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1.每处错误及其修改均仅限一词；
2.只允许修改10处，多者(从第11处起)不计分。
Scientists used a worldwide network of telescopes see and capture the first-ever picture of a black hole. The recent visual confirmation of black holes acts for the confirmation of Albert Einstein's theory of general relativity.
Black holes are made up of huge amounts of matter squeezed into a small area, created a gravitational(万有引力的) field which draws in something around it. They also had a way of super-heating the material around them and warping spacetime(扭曲时空). Material is heated to billions of degrees and reaches nearly the speed of the light. Light bends around the gravity of the black hole, where creates the photon(光子) ring seen in the image.
Relative to other object, supermassive black holes are actual small. They may seem invisible, and the way they interact with the material around them is the giveaway.

8 . When you finish reading the book, you will have __ better understanding of __ life.

A．a, the

B．the, a

C．/, the

D．a, /

9 . A certain famous actor donated a good sum of money and began _____school in this village, where many local children begin ____school at a proper age.

A．a, a

B．/,a

C．the,/

D．the, a

10 . If you want to be ______ success, please remember that failure is the mother of ______ success.

A．the; a

B．/; a

C．a; /

D．the; the