The schoolboys and schoolgirls are walking along the street, _____a small redcap .
At minus 130℃, a living cell can be __________ for a thousand years.
—Mom, Tom asked me to play football with him.Shall I go out now?—__________. Be careful and don't play in the street.
We must __________ him to be innocent until he is proved guilty.
__________ he knew that his children would not find their way back this time.
Being poor, they had to build a__________ shelter out of tree trunks.