The president spoke at the business meeting for nearly an hour without ______ his notes.
A lot of language learning,________ has been discovered, is happening in the first year of life, so parents should talk much to their children during that period.
Between the two parts of the concert is an interval,________ the audience can buy ice-cream.
The printer is of good quality. If it ________ break down within the first year, we would repair it at our expense.
They use computers to keep the traffic _________ smoothly.
I got to the office earlier that day,________ the 7:30 train from Paddington.