Choose the one that best completes the sentence and write do

Choose the one that best completes the sentence and write down your choice it the answer sheet.
29 how soon will it be _____robots become so intelligent that they will be able to do jobs which at the moment only human beings can do?
A before B that C when D since
30 As a senior professor she should have known better _____to get involved in such a scandal.
A and not B but not C than D than not
1 only in growth,reform and change,paradoxically enough,_____to be found.
A true security is B is true security
C true security can D can true security
9 the police guarded the airport carefully _____the criminal should escape from the country.
A or else B if C lest D unless
10 despite its lack of taste,color,odor,and calories water is _____powerful beverage.it is _____only substance necessary to all life.
A an ,an B the the C a the D the,an