Research shows that humans ______ from selfish to unselfish behavior when they are watched.
---You phone number again? ---I ___ quite catch it---It is 3453789..
---___ the sports meet might be put off.----yes, it all depends on the weather.
--Do you like the match?---Yes, it ___ very soft.
We were all surprised when he made it clear that he ___ office soon.
I hope to call ___ you ___ your office at two o’clock today.