6.　　　 The two scientists were ____ their research.

5.　　　 When did you ___ Mary?

4.　　　 It really ___ whether you work hard or not.

3.　　　 We must ___ what we do, even when others don’t.

2.　　　 He was away from home for about two years, and he often ____ his mother.

turn out, go by, dream of, get engaged to; be satisfied with; believe in; make a difference

1.　　　 Three years ____, but he still was alone.

5. Galileo’s observation showed that it was the earth that moves around the sun, not the sun moves around the earth.

　 Galileo’s observation showed it was the earth that moves around the sun, not ___ ___ ___ ___.

4. You can expect to get pay rise only with hard work

　 ____ by working hard ___ ___ ___ to get a pay rise.

3. She defeated all her classmates in the tennis match.

　 No one in her class can ___ ___ ____ tennis.

2. I find the maths problem can be worked out easily.

　I find ___ ___ ___ work out the maths problem.