Occasions are quite rare ____ I have the time to spend a day with my kids.
.---I’d like to call you at 10 o’clock next Friday morning if it is convenient. ---I’m afraid I _______ an important meeting.
._______ in the book, he didn’t notice my coming.
.Although this medicine can cure you _______ your illness, it has a bad effect ______ you.
.---Hey, you are wanted on the phone. ---_________ I’m coming.
.--- Only one of these books is worth _______. --- _______ is no wonder that you look so upset.