________ going to the program If You Are the One，she knew she had to be there or her mother would be unhappy.

So difficult ______ it to work out the problem that I decided to ask Tom for advice.

 Don't just give me a simple “yes” or “no” to my questions. Explain _______ possible.

--Did you visited the military museum?--Yes. Not until quite recently ________ any idea what a guided missile was like.

So small ________ that they don’t admit much light at all.