---______ the farmers discovered the entrance to the secret cave in the valley?
--- Totally by chance.
| A．When was it that | B．How was it that | C．How it was that | D．When it was that |
Berners-Lee made possible for everyone to use the Internet, not just universities and the army.
| A．him | B．it | C．this | D．that |
My first ________ of him was that he was a kind and thoughtful young man.
| A．expression | B．attention | C．satisfaction | D．impression |
you put your heart into English, you’ll be interested in it.
| A．The more; the more | B．The more close; the more clear |
| C．The closer; the clearer | D．The closer; the more clearly |
This is the first time that he your hometown.
| A．visited | B．visits | C．had visited | D．has visited |
I’d love to watch the specially dogs that can act as guides to the blind.
| A．training | B．being trained | C．trained | D．to be trained |