Although the first part is easy the rest ____.
| A．is supposed difficult | B．are difficult |
| C．has proved difficult | D．could have been difficult |
It has been accepted that all the students ____ put on masks before going to school in case they are infected with flu virus.
| A．shall | B．will |
| C．need | D．may |
-I need to put a cross on the map to show ____ that famous hotel is.
-____? Mary’s done it already.
| A．where; Why bother | B．wherever; How come |
| C．what; What for | D．whatever; So what |
Measures must be taken to prevent pollution ____ happily.
| A．from we live | B．for us to live |
| C．us living | D．from our living |
Despite being taken from very different sources, the results are remarkably ____.
| A．consistent | B．constant |
| C．contradictory | D．controversial |
-What about the price of these washing machines?
-They are equal in price to, if not cheaper than, ____ at other shops in the street.
| A．others | B．it |
| C．that | D．the ones |