Einstein’s theory, which was doubted by most scientists at first___out to be correct in the end.
| A．proved | B．was proved | C．turned | D．tested |
I’ve lived in New York and Chicago，but don’t like ________of them very much.
| A．either | B．any |
| C．each | D．another |
Recycling is one way to protect the environment；reusing is________.
| A．another | B．the other |
| C．one another | D．one |
At our factory there are a few machines similar to ________ described in this magazine.
| A．them | B．these |
| C．those | D．ones |
It’s an eitheror situation －we can buy a new car this year or we can go on holiday but we can’t do________.
| A．others | B．either |
| C．another | D．both |
My mom suggests that we________eat out for a change this weekend.
| A．should | B．might |
| C．could | D．would |