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26.Before the construction of the railroad, it was prohibitively expensive to transportany goods across the mountains.
A.determinedly B.incredibly C.forbiddingly D.amazingly
27.Scarcely does anyone want to become janitors, but to be appointed as a sanitary engineer is quite something else.
A.senior B.military C.clean D.skilled
28.Nowadays, the prescribed roles of the man as “breadwinner” and the woman as housewife are changing.
A.original B.prevalent C.ascribed D.settled
29.The new chemical will exterminate this kind of insects in this area.
A.eliminate B.prosecute C.quench D.quit
30.He stepped gingerly into the ramshackle old house.
A.slowly B.recklessly C.cautiously D.alertly