13. -- The organizer didn’t make ________ clear who would be the winner of the competition. -- He did. Whoever __________ to the top of the mountain will win.
---- Is Mary coming to the concert? ---- I think ________.
---- Have you been here long? ---- _______.
________ mud on his trousers brushes off easily.
The young lady was careful _________.
________ their inexperience, they’ve done a good job.