________ from the moon, our earth with water ________ seventy percent of its surface looks like a blue sphere.

________his famous number 23 shirt, Michael Jordan became the most successful basketball player in the history of the game.

When ________ why she could speak English so well, she just smiled and said nothing.

Many parents happily pay a lot of money, only ______ the tours are not rewarding enough for their children.

The teacher just took down the names of the students _______ during the exam.