Space exploration has been made ______ with the development of modern science and technology.
| A．it possible | B．it was possible | C．that possible | D．possible |
The snowstorm ________ our difficulties.
| A．added to | B．added up | C．added up to | D．has added |
Thomas wants to know ______Nina lives.
| A．where | B．who | C．what | D．if |
—Did you see Peter and Mike?
— No, I saw ______of them.
| A．neither | B．either | C．both | D．none |
When you don’t know a word, you can _________ in the dictionary.
| A．look it up | B．set it up | C．give it up | D．pick it up |
— It's so cold today.
— Yes, it'scolder than it was yesterday.
| A．some | B． more | C． very | D． much |