I don’t know ....... to do.

How long ................... to fly from London to New York?

People over forty need .................. regular check-ups at least once a year.

Whenever I travel to the United States, I............. my cousins.

Which one of the underlined words or phrases is INCORRECT? Collecting insects and worms were the most difficult part of …

Should you come and visit us again in the future, we ................................happy to put you up.