Wang Pin is an advanced worker in our company. He _______ for four years in Yangzhou University.
| A．studied | B．has studied | C．had studied | D．has been studying |
She can’t help ______ the house because she’s busy making a cake.
| A．cleaning | B．to clean | C．cleaned | D．being cleaned |
The country life he was used to _________ greatly since 1992.
| A．change | B．has changed | C．changing | D．have changed |
You_______that mistake；you were too careless．
| A．should not make | B．should not have made |
| C．ought not have made | D．must not have made |
I really don’t think my best friend w ill be angry, but I’11 go and see her，in case she _______.
| A．will be | B．is | C．does | D．has been |
Paris is________most beautiful city，where you can see_______famous Eiffel Tower．
| A．a；the | B．a；不填 | C．the；a | D．the；the |