The Olympic Games is held ________.
| A．each four years | B．every four years | C．each four year | D．every four year |
____ Knowledge of English is a must in international trade.
| A．the | B．/ | C．A | D．An |
Cloning the sheep ----Dolly is a big ____ in science.
| A．progress | B．run | C．jump | D．rush |
----Who did you spend last weekend with?
---- _________________ .
| A．Palmer’s | B．The Palmers’ | C．The palmers | D．The palmer’s |
She is not worth _ .
| A．to get angry | B．getting angry | C．getting angry with | D．to get angry with |
---Shall we go swimming? ---Ok, I’ll just go and get __ .
| A．changed | B．to change | C．to be changed | D．changing |