All of us can see some _______in this picture. Which is NOT right

I don’t think it is __________taking the trouble to explain the question to him.

She looks very happy. She ______ have passed the exam.—I guess so. It’s not difficult after all.

Unlike the earth, Mars is too cold and Venus is far too hot _______ there to be any life

24. However busy you are, try to _______ at least half an hour each day to practice listening and reading.