He attends the evening class ____, that is, Monday, Wednesday and Friday.
| A．every two days | B．every the second day |
| C．every two day | D．every other day |
It is a paradox（自相矛盾） that in a rich country there should be many poor people.
| A．such; such | B．such; so | C．so; so | D．so; such |
We began to open to the outside world in the ate 1970s. , there have been great changes in the country.
| A．As a result of | B．As a result | C．First of a11 | D．After all |