As the intelligence of robots increases to match ________ of humans,we may use them to expand our frontiers.
We are going to talk about the problem _____ at the last meeting.
If this dictionary is not yours, _____ can it be?
It's no longer a question now _____ man can land on the moon.
—Do you know where the manager lives? —Yeah, but I have to _____ the telephone book for his address.
Whenever his mother spoke to him, ____ was fairly often, he would talk on and on without giving her a chance to speak.