We must take two aspects into consideration , both of _______ associated with the safety of the students .
.Measles ______ a kind of infectious illness.
.The Philippines ______ to the south-east of China.
.Mary is one of the girls who ______ always on time.
.Tom is the only one of the stall members who ______ to be promoted.
.What caused the accident ______ on the road.