—Have you known Dr. Jackson for a long time?—Yes, since she________ the Chinese Society.

When he was alive, the old scientist used to say that knowledge ______ from practice and he gained his experience by doing a lot of practical work.

A killer whale at Sea World Orlando jumped out of its tank on Wednesday and fatally attacked a worker as horrified visitors _______.

What’s the time?  My watch _______.

In a foreign company, if you have a good command of English, you      much more easily.