I often have conversations with John over ______ telephone, while keep in touch with Tom by ______ letter.

– Bad luck! I failed again in the driving test.– You are sure to succeed if you try _____ third time. What’s more, experiencingfailures can also be _____ pleasure.

—I’m going on         diet these days.—In my opinion, you should have      balanced diet.

According to the recent reports, one of the animals, _____ crocodile, is in _____ danger of dying out.

(2013·高考新课标全国卷Ⅱ)Four and  ________ half hours of discussion took us up to midnight，and  ________ break for cheese，chocolate and tea with sugar.