1 . The Palace Museum has put on many attractions since it ___________ in 2017.

A．had been rebuilt

B．was rebuilt

C．had rebuilt

D．rebuilt

2 . 8 students and 2 teachers        at Santa Fe High School by a 17-year-student armed with a shotgun and a pistol. This is one of the many gun-related tragedies that have happened in the last 2 years.

A．killed	B．were killed
C．have killed	D．have been killed

3 . Chinese kites in ancient times ________ in the shape of birds.

A．design	B．had designed
C．were designed	D．have been designed

4 . In view of rapidly aging population,the second-child policy      at the start of 2016.

A．is adopted

B．was adopted

C．has been adopted

D．was being adopted

5 . The plan for Xiongan New Area ______ officially on April 1, 2017.

A．announced

B．was announced

C．announces

D．is announced

6 . Kate ________ by the teacher for she had made an excellent contribution to group discussion.

A．praised	B．was praised
C．has praised	D．has been praised

7 . He ______ a chance to try it again just now.

A．gave

B．will give

C．is given

D．was given

8 . In the early days, Beijing Opera ______ on open-air stages or in teahouses.

A．performed	B．was performed
C．performs	D．is performed

9 . —Have you heard about the shark attack accident at the SeaWorld show?
—Yeah, how horrible! A trainer ______ in front of the audience.

A．had been killed	B．has been killed
C．was killed	D．is killed

10 . The report aims to explain how these conclusions ______.

A．were reached

B．had been reached

C．have reached

D．had reached