-Did you reach the US the next day?
- No. Somehow . it was three days_______ I arrived there.
| A．since | B．when | C．that | D．before |
_______ is known to everybody that the moon travels round the earth once every month.
| A．It | B．As | C．That | D．What |
_____ is known to everybody, the moon travels round the earth once every month.
| A．It | B．As | C．That | D．What |
The factory was built in a secret place, around ______ high mountains.
| A．which was | B．it was | C．which were | D．them were |
This is the magazine _______ I copied the paragraph.
| A．that | B．which | C．from that | D．from which |
I can never forget the day _______ we worked together and the day ______ we spent together.
| A．when; which | B．which; when | C．what; that | D．on which; when |