________ twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.
Provide your doctor with a detailed medical history________he can give you accurate treatment.
While working outdoors,Linda was________by the heat and fell to the ground,unconscious.
The man answered the phone in a loud voice at the meeting,________made Andy annoyed.
There is no simple answer,________is often the case in science.
Finding information in today’s world is easy.The ________is how you can tell if the information you get is useful or not.