Being examined twice a year, whether it is a car or a bus or a truck, is the rule that every driver _____ obey in this city.
In China, smokers have to face the reality that ______ people are dying of lung cancer.
Not all the students follow the rules. Which of the following statement has the same meaning?
The farm grows various kinds of crops, _______ wheat, corn, cotton and rice.
The boss insisted that every minute ______ made full use of ______ the work well.
Rather than _______ here waiting, I prefer _______to find out what on earth has happened.