She must stay at home to look after her _______ mother. She was _______ a week ago.

Stephen lives in a ___________ flat with a big balcony. And he often chats with his friends _________ the balcony.

Nobody can learn English well __________he works hard on it.

Would you like to come to my birthday party-__________.

It was________of Michael to inform us of his delay in case we got worried.