Everybody knows about it now! But no one knows ________ once prevented the rumor from spreading.
| A．what was it that | B．what it was that |
| C．how it was that | D．why it was that |
They’re looking forward_____ the coming of New Year’s Day.
| A．to visiting | B．to visit | C．to having visited | D．visiting |
-- The thread of my kite broke and it flew away.
-- I had told you it would easily break_______ it was the weakest.
| A．when | B．since | C．unless | D．where |
The violin will have to be tuned before it _____.
| A．plays | B．should play | C．is played | D．is being played |
Charles Babbage is generally considered_____ the first computer.
| A．to invent | B．inventing | C．having invented | D．to have invented |
_________ I can see, there is only one possible way to keep away from the danger.
| A．As long as | B．As far as | C．Just as | D．Even if |