Of the estimated 42 million homeless people around the world, children again ______ one third.
| A．make up | B．take up |
| C．build up | D．turn up |
. 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 |
.With no one to ______ in such a frightening situation, she felt very helpless.
| A．turn on | B．turn off | C．turn around | D．turn to |