Putin hopes his daughters can do _____ job suits their interests and personalities.

The consequences of our actions are unbelievably complicated and diverse _______ predicting the future is a very difficult business indeed.

There are some warnings in some countries ______ over exploitation of underground water has caused the decline of wetland and increase of desertification.

 It was the training _____ he had as a young man _____ made him such a good engineer.

There is no doubt ________ he will succeed.