13. If water is heated to 212 degrees F ____ as steam.
(A) it will boil and escape
(B) it is boiling and escaping
(C) it boils and escape
(D) it boil and escapes
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統計: A(301), B(11), C(4), D(3), E(0) #3099262
統計: A(301), B(11), C(4), D(3), E(0) #3099262