entists are trying to developa special material, _______ they will make use of in space.

The boy was _________ jeans and a verysmart jacket.

Did you watch the film Frozen on the Internet yesterday? — No, I _______my mother do housework all day

The moment we heard the news of the earthquake, we began to ________ the work to rescue those who were trapped in the building.

Could you be so kind as to close the door?—______.