Due to the widespread ______ of this medical technology, more diseases can be discovered and treated at an early stage.
Why not look up the new word in a dictionary _____ you don’t know it ?
Of the two lectures, the first was by far _____, partly because the speaker had such a dynamic style.
---It’s a lovely day, isn’t it?---Yes. I love _____ when the weather is like this. Why don’t we sit outside and have our lunch?
In which play is _____ your brother appear?
It must be he that has stolen Mr. Smith’s purse, _____?