We don’t write to each other regularly，but we do keep in
touch by telephoning _____.
| A．at a time | B．once | C．at once | D．once in a while |
I wouldn’t want to go back an employee now that I have been self-employed．
| A．to be | B．have been | C．be | D．to being |
Our enemy bills have been increasing steadily． these costs，our telephone costs have doubled over the past six months．
| A．Moreover | B．In addition to | C．As a result of | D．Contributing to |
_________we sleep together or apart is one of the biggest cultural differences, and only in western societies ______ the feeling that babies should sleep apart from their parents.
| A．No matter; it is | B．Whether; is it | C．No matter; there is | D．Whether; is there |
Is _________ 48 hours _________ the man-made satellite _________ is made in our country to orbit the planet around?
| A．it; that; where | B．it; when; that |
| C．it for; that it takes; that | D．it; that it takes; which |
In no place other than Britain ____ experience four seasons in a single day.
| A．you can | B．people can | C．can one | D．can it |