HISTORY, there have been long periods when one might barely detect a single change in pronunciation.

I often used to go walking through the forest with my parents when I was younger. // WOULD// My parents . . . take walks through the forest when I was younger.

How often do we struggle to figure _____ a problem and then, after a night's sleep, we wake up knowing exactly what to do?

Some countries are in favor of abolishing leap seconds while others ARGUE/DISAGREE/DISPUTE/QUESTION that the technical challenges are manageable.

He described this time as like a prison sentence with harsh, TOLERATE conditions.

I was always convinced our business would be a success.//MIND// There was never . . . that our business would be a success.

Many birds have special SIGNIFY for humans but none is perhaps more respected than the owl.

Tom and Alexis said "We're getting married in May." //ANNOUNCED// Tom and Alexis . . . in May.

Being completely honest about your opinions isn't always advisable./IDEA// It isn't . . . completely honest about your opinions.

The rules are EXACTLY/RATHER/THEREBY/SOMEWHAT straightforward: bring a book and lose yourself in it the way you did as a child.

I'm proud of the fact that we built our home recording studio without any help.// BY // The fact we built our home recording studio . . . feel proud.

It's 7pm and I'm sitting in a café I've never been in before. It's CRAMMED/CRUSHED/MASSED/PILED with people, but nobody's talking.

But this chance discovery of useful materials _____ undergoing a change.