However, in ________ recent years, _________ Niagara Falls have come to be appreciated more for their natural beauty as _________ wonder of Nature.
Excuse me for breaking in, ______ I have some news for you.
Why pleasant smells do not reduce pain in man is a question still _______ by scientists.
I am told to guess the meaning of an unknown word, but my question is _______ I still can’t understand its meaning.
Throughout______ history, ______ English language is made up of the rules each group of people brought to Britain with them.
Can you tell me _________________ last night?