In the past half-century, average incomes _______ quickly in developed countries, yet happiness levels have remained almost the same.

My daughter________ hard for more than one year to realize her dream joining the Party and now her dream comes true.

I asked him to come at seven o’clock, but he __________. It’s already eight o’clock．

—Here’s the key to my car. —Thanks, but I must know where you ______ it.

 The three of us ________ around Europe for about a month last summer.