People complain that decisions to approve or deny a permit are often ______ rather than based on fixed criteria.
| A．appropriate | B．conscious |
| C．arbitrary | D．controversial |
— It’s the office! So you ______ know eating is not allowed here.
— Oh, sorry.
| A．must | B．will | C．may | D．need |
Nowadays people sometimes separate their waste to make it easier for it ______. .
| A．reusing | B．reused | C．reuses | D．to be reused |
She is very dear to us. We have been prepared to doit takes to save her life.
| A． | whichever | B． | however | C． | whatever | D． | whoever |
Would you please keep silent? The weather report andI want to listen.
| A． | is broadcast | B． | is being broadcast |
| C． | has been broadcast | D． | had been broadcast |
The collapse of the World Trade Centre has put US economy in a difficult___________.
| A．occasion | B．case | C．situation | D．background |