1.

The raw materials is so hard (solid) that they _________ disintegrate by water.

A. do
B. may be
C. do not
D. that they _________ disintegrate by water.a) dob) may bec) do notd) may or may not
Answer» D. that they _________ disintegrate by water.a) dob) may bec) do notd) may or may not


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