Helen has got ________ it takes to be a great tennis player. In other words, she has the potential to become world famous.

Israel was created as a homeland for homeless Jews after  World War Ⅱ. However, the creation of Israel in ________ used to be Palestine left many Palestinians homeless.

After ________ seemed a hopeless wait, four coal­miners trapped in the mine for 125 hours were finally rescued in Heilongjiang Province.

In the office an electrical engineer is looking through the instructions to know ________ the heat system works before the repair work.

Energy, passion and a burning desire are, you see, ________ true learning takes.

________ is the most important for him is not his job, but his family.

What I like about Harvard is ________ there's the old classical look—there are parks and traditional buildings.

________ left the door unlocked must be held responsible for the accident.

It is ________ the pupils do in their spare time ________ really prepares them to take their place in society as citizens when they grow up.

His shop was so well managed that he sold in just 5 months ________ his competitor sold in a year.