________ I thought it was Mary, but when I looked again I saw it was Jane.

[　　]

A．At sight　　　　　　B．In sight

C．At first sight　　　　D．On sight

Wilhelm Conrad Roentgen was ________ first Nobel Prize Winner in ________ physics and his work started ________ series of revolutionary discoveries during the last 100 years.

[　　]

A．the; 不填; a　　　　  B．the; the; 不填

C．a; the; a　　　　　　 D．不填; a ;不填

Don't waste our energies. Lets ________ in the business.

[　　]

A．join together　　　　B．connect

C．join hand　　　　　D．join hands

From the dates ________ on the gold coin, we decided that it was made five hundred years ago.

[　　]

A．marking　　　　　　B．marked

C．to be marked　　　　D．having been marked

During the ten-day vacation, they traveled to France ________ their own expense.

[　　]

A．on　　　　B．with

C．at　　　　D．in

The two sides have finally ________, though some small differences still exist.

[　　]

A．made a decision　　　　B．reached an agreement

C．settled down　　　　　D．broken up

　　——Shall Mary come and play computer games?

　　——No, ________ she has finished her homework.

[　　]

A．when　　　　B．if

C．unless　　　　D．once

Brazil defeated Italy ________ third place in the 1978 World Football Cup.

[　　]

A．to take　　　　B．to become

C．taking　　　　D．becoming

The question came up at the meeting ________ we had enough money for our research.

[　　]

A．that　　　　　B．what

C．which　　　　D．whether

　　——Show me your permit, please.

　　——Oh, it's not in my pocket. It ________.

[　　]

A．might fall out

B．could fall out

C．should have fallen out

D．must have fallen out