Before the tourists set off , they spent much time setting a limit _____ the expenses of the trip.
— 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 ________.
Although the old man was ____ , but he didn’t feel ______. He had a dog as a company.