It is reported in Washington Post that an unknown terrorist group has ______ responsibility for this morning’s bomb attack.
________ mud on his trousers brushes off easily.
The young lady was careful _________.
The bridge is so important to the people here that once ________ it must be carried out without delay.
Though they had a meeting yesterday, there is still much that remains______.
The students expected there ________ more free time before the test.