Why ____ you keep troubling your mother with such question while he is busy . 

From what I learn about their hotel, the service and the weather, they    their holiday very much.

 But for water，it ______ possible to live in the desert．

In this country it is required that anyone who wants to settle here ______ to pass this kind of test.

The man insisted that he _______ the old lady’s money and _______ at once.