The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
Who can you turn to in time of danger, if not ___?
I’m looking forward as much to her return as she herself to ___ me.
—Susan, will you please go and empty that drawer? —______?
What surprised me was not what he said but ___ he said it.
It shames me to say it, but I told a lie when ___ at the meeting by my boss.