Can you explain ____ most deserts are located near the west coast of the continents?
| A．why is it that | B．why it is that |
| C．how it is that | D．how is it that |
. I have ____ Tony to stay away from computer games before he becomes addicted to them.
| A．urged | B．suggested | C．made | D．kept |
. I got nervous when the woman _____ opposite kept staring at me.
| A．seat | B．to seat | C．seating | D．seated |
. When asked why he went there, he said he was sent there ____ for a space flight.
| A．training | B．being trained | C．to have trained | D．to be trained |
. They desired that they _____ the right to vote.
| A．had | B．have | C．are | D．were |
. He was about to go out for a walk _____ his teacher came to visit him.
| A．while | B．which | C．when | D．then |