I can well remember that there was a time _____ a deep blue sky, the song of the birds, moonlight and flowers could never have kept me spellbound.
---- Have you been here long? ---- _______.
________ 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______.