12. My mouth went dry/ drily and I closed my eyes.

11. I’ve loved as if you had been /were my son.

10. The Second World War broke down /out in September, 1939.

9. “Now that we are alone, we can speak freely.” “Now that” here can be replaced by Since/ For

8. We watched, amazing/ amazed.

7. Please allow me to explain / explaining that I didn’t have any idea about his plan.

6. Last month I was enough lucky/ lucky enough to have a chance to make a trip into space with my friend Li Yanping, an astronomer.

5.　　　 Because / As days went by, I discovered that my impressions had been right.

4.　　　 We all think over /of Li Ming as our friend.

3.　　　 He rushed out, with books lying/laying open on the desk.