When a pencil is partly in a glass of water, it looks as if it ______.
| A．breaks | B．has broken |
| C．were broken | D．had been broken |
Mr Green often says “what is learnt in the ______ lasts to the grave”, intending to impress on us the significance of reading more books while we’re young.
| A．brochure | B．association | C．encyclopedia | D．cradle |
The _____ in temperature is broadcast twice a day in the channel.
| A．diversion | B．variety | C．variation | D．diversity |
Such a good opportunity, once ______, might never come again.
| A．lost | B．to lose | C．losing | D．loses |
_________ you may have, you should gather your courage to face the challenge.
| A．Whatever serious a problem | B．However serious a problem |
| C．However a serious problem | D．No matter how a serious problem |
Faced with difficulties, you should believe your confidence is _______ makes a difference.
| A．what | B．that | C．which | D．whether |