According to the government, the new tax law will not ________until next month.
The old man has two sons, __________ lives with him, so he has always felt lonely since his wife’s death.
No matter where he is, he makes ________ a rule to go for a walk before breakfast.
It is said that ________ wool product in Australia is of _________ high quality.
-- You know I dropped medicine and __________ physics. --- You made a right decision.
--Hey, Mary, you are wanted on the phone. ---________I’m coming.