.In the near future, more advances in the robot technology _____by scientists.
Although some unexpected difficulties have ________ in the process, we are confident that we can handle them.
As we all know, the problems of environmental pollution facing us today are far from ____.
He presents a new _____ to learning a foreign language, which I think is of great value.
He describes everything in _______ order, which makes ________ excellent impression upon us.
— Unfortunately, I left my keys at home. — ________. I have an extra set.