Though great efforts have been on their study, Annie still can’t make any improvements, which makes her parents greatly ______ .[ ]

In the UK and the USA people often giveflowers and cakes as birthday presents. They ________ open their presents atonce.

There was snow last winter.

________ some teenagers don’t realize is ________difficult life can be after they get addicted to drugs.

know what time you’ll be backthis evening, Eric—-I’m not sure. It depends on_______ theinterview lasts.