My parents always remind me to make sure the electricity is turned off while I am having a bath,which would _____ cause danger, leading to a dreadful consequence.[ ]

What would you like for __________ breakfast—I would like two pieces of bread and _________ cup of tea.

Most smoker say that they _______ smoking to some degree, but health experts suggest that they had better _______.

We’re expecting Jerry because he’s our_________ visitor who comes here for holiday every summer

If you write something and send it immediately by email, which you ___later regret, there is no chance for second thoughts．