1. WATERPROOF:

    (A)soggy

    (B)natural

    (C)unglazed

    (D)viscous

    (E)permeable

　2. REFUTATION

    (A)approval

    (B)verification

    (C)amplification

    (D)concurrence

    (E)computation

　3. UNSUBSTANTIATED:

    (A)having unknown consequences

    (B)carefully

    (C)modified

    (D)minimized

    (E)verified

　4. UNDERMINE:

    (A)submerge

    (B)supercede

    (C)overhaul

    (D)undergird

    (E)intersperse

　5. NEGATION:

    (A)allegiance

    (B)affirmation

    (C)guarantee

    (D)acquittal

    (E)validit

参考答案：

1.E 2.B 3.E 4.D 5.B