In the near future, more advances in the robot technology ___by scientists .
I'm happy ________________ you are happy.A. if B. unless C. as long as
_________ I am, I will be thinking of you.A. Where B. Wherever C. Who
Wuhan lies _____ the Changjiang River and the Han River meets.A. where B. wherever C. that
It’s nice to hear from her again. ________, we last met more than thirty years ago.
The old man, ________ abroad for twenty years, is on the way back to his motherland.