Which words in the sentence are the adverb clause?
it is usually not too hot unless the heater is set too high.

a. unless the heater is set too high

b. not too hot

c. it is usually

d. the heater is set

The voussoirs rest on the centering until the keystone is wedged into place. at that point, the centering can be dismantled. what does the word dismantled mean? a. to take apart b. to put together c. to cover d. to lift up