---It’s the office! So you _____ know eating is not allowed here. ---Oh, sorry.
We’ll talk about some cases_______ drivers obviously knew the traffic rules but didn’t obey them.
In such a fierce competition, a person has to make every effort if he_______.
--How often do you eat out? --______, but usually once a week.
We’d like to arrive half an hour early________ we can have time for a good rest.
To keep healthy, Mr. Smith_______ cycling as a regular form of exercise after he retired.