Class regulations require ______ is the last to leave the classroom ______ off all the lights.
| A．who; should turn | B．whomever; turn |
| C．whoever; turning | D．whoever; turn |
The ‘how-to’ book can be of use to wants to do the job.
| A．who | B．wha t |
C．whoever | D．whatever |
. ______ we are sure about is the need to prevent children from being spoiled.
| A．What | B．Which | C．Whether | D．That |
. I was wondering what it is _____ has made her so popular with her workmates.
| A．that | B．which | C．how | D．who |
She ______his number in the phone book to check that she had got it right.
| A．looked up | B．looked after | C．picked out | D．picked up |
Food safety is _____ important, so the government spares no efforts to prevent food pollution.
| A．highly | B．eventually | C．gradually | D．easily |