No one really knows exactly when the first group of people arrived in ______ we now know as California.
| A．what | B．when |
| C．where | D．which |
_____he entered the room,he picked up the phone and told the news to his parents.
A,At the moment B,Hardly C,The moment D,No soon
____I see her,I will find some changes in her.
A,As soon as B,Every time C,The moment D,The first time
It was not until midnight________they reached the camp site.
A,that B,when C,while D,as
_______you eat the correct foods_____be able to keep fit and stay healthy.
A,Only if,willyou B,Onlyif,you will C,Unless,will you D,Unless,you will
_____the beginning of the 19th century did scientists know that all matter is made up of atoms.
A,At B,By C,Up to D,Not until