Burning all the lights in the classroom will be a great______ on electric power.
| A．waste | B．lack | C．drain | D．damage |
相关试题
______ is obvious to the students that they should get well prepared for their future.
| A．It | B．What | C．That | D．This |
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 |
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