In the near future, more advances in the robot technology _______ by scientists.

Miss. Gao _______ in the library for three years. But now she is a teacher.

A new bridge _______ across the river in Changsha and it is expected to open next year.
A. is built            B is being built       C. are built       D. has been built

To our relief, Xiaodan as well as the other children who ______ no parents ______ good care of in the welfare institute.

The manager _______ the workers how to improve the program since 9 a.m.

I don’t know whether he has finished the novel, but he ________ it this morning.

His work was_____by his boss.

----Have you worked in this company for a long time?
---- Yes, since I _________ from the college.

I _____ Wang Tao in the street yesterday. We _____ each other since he went to Beijing.

Climbing Mount Tai           great skills and           not without risk.