1 . This smart phone hasn’t been commercially a________ yet, for it’s still in the testing process. (根据首字母单词拼写)

2 . E________ in nucleic acid (核酸) testing, the medical staff had no time to rest. (根据首字母单词拼写)

3 . ________ in 1636, Harvard is one of the most famous universities in the world.

A．To found

B． Founding

C．Founded

D．Having been founded

4 . ________ (commit) to scientific research, the scientist remained single all his life. (所给词的适当形式填空)

5 . The research,         by Tsinghua University, shows that different parents have different approaches to these problems.

A．conducted

B．to conduct

C．conducting

D．to be conducted

6 . Ordinary soap, ____________ (use) correctly, can deal with bacteria effectively. (所给词的适当形式填空)

7 . Jim has retired, but he still remembers the happy time ____________ (spend) with his students. (所给词的适当形式填空)

8 . With so many brightly colored flowers ________ (plant) around the building, her house looks like a beautiful garden. (所给词的适当形式填空)

9 . The county, ________ (locate) in the north of Shangxi, has a history of more than 1,400 years. (所给词的适当形式填空)

10 . Children, when a_____(陪伴) by their parents, are allowed to enter the stadium. (根据中英文提示单词拼写)