The police were seeking more information to find out________ killed the rich merchant.
| A．who it was that | B．who was it that |
| C．it was who | D．who was it |
______ has an interest in the lecture can go for a ticket from the office next to the gate of the lecture room.
| A．No matter who | B．Whoever | C．Anyone | D．Those who |
The new China was founded in 1949, ______ great changes have taken place.
| A．since when | B．after which | C．in which | D．when |
She insisted that we ________ the source of the river and begin our journey there.
| A．find | B．found | C．had found | D．would find |
Popular music is well_____ by most young people.
| A．thought about | B．thought over | C．thought out | D．thought of |
---I am going to Japan.
--- How long_____ you_____ there ?
| A．are; stayed | B．are; staying | C．have; stayed | D．did; stay |