The headmaster was dismissed three months ago.The post is too important to leave __________ any longer,especially before the college entrance examination.
| A．alone | B．away | C．vacant | D．occupied |
Danby left word with my secretary ________ he would call again in the afternoon.
| A．who | B．that | C．as | D．which |
Do you have any ideas ________ is actually going on in the classroom?
| A．that | B．what | C．as | D．Which |
Elephants have their own way to tell the shape of an object and ________ it is rough or smooth.
| A．不填 | B．whether | C．how | D．Which |
I was surprised by her words, which made me recognize ________ silly mistakes I had made.
| A．what | B．that | C．how | D．which |
The poor young man is ready to accept ________ help he can get.
| A．whichever | B．however | C．whatever | D．whenever |