We cannot figure out _______ quite a number of insects, birds, and animals are dying out.
Mrs. Green wants to buy that kind of cloth because she___________ that the cloth__________ very well.
_______ Tom, we wouldn’t have been late for the last bus.
The twin brothers stand under the tree, ______ and say nothing.
. ________ that I was puzzled.
The factory, including its machines and buildings, ______ burnt to ashes during the fire.