____ a fax can be read by anyone, you should be careful what you send.

[    ]

A. Now that   B. That   C. Because   D. Since

If you want to send information abroad, you'd better send a fax, ____ it will be received more quickly.

[    ]

A. because   B. so   C. as a result   D. as

The first thing for you to do to become a useful member in an office is to learn ________ certain pieces of equipment.

[    ]

A. use   B. to use   C. how use   D. how to use

Travelling by air is more expensive _______ travelling by train, but much quicker. 

[    ]

　　 A. that   B. than   C. then   D. thus

_______ you have learned how to use the modern equipment, you'll be able to work properly.

[    ]

A. Unless   B. Until   C. Once   D. As

The fax machine can also change the signals back ______ the shapes of letters. 

[    ]

　　 A. in   B. to   C. into   D. on

We decided not to climb the mountains because it was raining ____.

[    ]

A. badly   B. hardly   C. strongly   D. heavily

Sorry to have kept you waiting so long. You must have thought we ________.

[　　]

-“Mrs White will be here tomorrow.”

-“Oh, I thought that she ________ today”.

[　　]

How long is it since you ________ in Shanghai?

[　　]