.He keeps on with physical training in winter _________ cold it is.
I was just about to leave ______the telephone rang.
— Why don’t you go into the office ,John —I have ______ my office keys at home.
The reason ______she didn’t come to school was_____she had to look after her sick mother.
I smell something ______ in the kitchen. Can I call you back in a minute ?
— David has studied hard since last term. — ________ , and ________.