He has been to America twice, _____.
| A．so have I | B．so I have | C．I have so | D．so did I |
He is absent ____ is often the case.
| A．what | B．which | C．who | D．as |
It is the first time ____ I have come to your city.
| A．that | B．which | C．what | D．when |
Who ____ has the same idea as it will do it in this way.
| A．who | B．that | C．whom | D．which |
I shall never forget those years ____ I lived in the country with the farmers, ____ has a great effect on my life.
| A．that, which | B．when, which | C．which, that | D．when, who |
This is the only book ____ I can find.
| A．that | B．which | C．it | D．with which |