happened to be no one in the building when the fire broke out.
| A．It | B．There | C．This | D．That |
. New mineral resources may be discovered during the forthcoming Antarctic _____.
| A．excursion | B．execution | C．extraction | D．expedition |
. Probability is the mathematical study of the _____ of an event's occurrence.
| A．desire | B．likelihood | C．result | D．effect |
. Driving a car without insurance can have _____ consequences.
| A．uncertain | B．disastrous | C．potential | D．unworthy |
. The police refused to _____ the clues they were working on.
| A．exhibit | B．disclose | C．expose | D．discern |
. What you have done is _____ the doctor's orders.
| A．attached to | B．resistant to |
| C．responsible to | D．contrary to |