__________ you understand the rule, you will have no further difficulty.
| A．While | B．Once | C．Though | D．Unless |
This is the first time that I ________ this famous temple.
| A．am visiting | B．will visit |
| C．have visited | D．visit |
Due to bad weather, the police had to ________ the search for the missing boy.
| A．resign | B．abandon |
| C．conduct | D．urge |
To be honest, it took me more than a month to ________ myself ________ the new school life.
| A．adjust; to | B．adopt; to |
| C．adapt; into | D．addict; into |
Life is not as smooth as we expected. We may have periods in our life ________ everything seems tough.
| A．when | B．where |
| C．which | D．that |
With so much work ________, I’m afraid I can’t go swimming with you.
| A．doing | B．done |
| C．to do | D．to have done |