15.If ever again ____ happens an accident like this, we will have only ourselves to blame.
A.it
B.so
C.there
D.that
16.An ambulance must have priority as it usually has to deal with some kind of __
A.crisis
B.emergency
C.urgency
D.emergence
17.She was complaining that the doctor was __ too much for the treatment he was giving her.
A.expending
B.offering
C.costing
D.charging
18.The patient's health failed to such an extent that he was put into __ care.
A.tense
B.rigid
C.intensive
D.tight
19.Although architecture has artistic qualities, it must also satisfy a number of important practical __
A.obligations
B.regulations
C.observations
D.considerations
20.Too much __ to X-rays can cause skin burns, cancer or other damage to the body.
A.disclosure
B.exhibition
C.contact
D.exposure
21.In his last years, Henry suffered from a disease that slowly __ him of much of his sight.
A.relieved
B.jeopardized
C.deprived
D.eliminated
22.Plastics today contribute to a wide __ of industries.
A.field
B.area
C.scope
D.range