The two elements ____________water is made are the oxygen and hydrogen.A.thatB.whichC.of

To prevent a repetition of this dreadful occurrence, we must discover the ______ element i

The most elemental grammatical units in a language are______.A．phonesB．wordsC．morphemesD．p

According to the old－timers, on two occasions ______.A．the water of the lake turned redB．l

In motorships，there are two main circuits, _____.A.one salt water, one fresh waterB.one sa

But water, natures most essential element, is becoming increasingly______.A．barrenB．absent

The three elements of the federal government include the following except______.A．Executiv