The patient was in bad need of operation but there was no guarantee(保证) that she would survive the anaesthetic (麻醉剂), which made the doctors on the horn of a __________.
| A．process | B．arrangement | C．ceremony | D．dilemma |
I still remember that terrible accident a few days ago, ____ more than 20 pupils were killed.
| A．where | B．that | C．on which | D．which |
The police said they would not give up looking into other possibilities ____they find out what happened.
| A．as | B．while | C．until | D．although |
When Justin didn’t ____ for lunch the next day, Mrs Foster became worried and called the police.
| A．give up | B．show up | C．make up | D．stay up |
If ____ in, the viruses can result in illness or even deaths.
| A．breathed | B．to breathe | C．breathes | D．is breathed |
Standing inside ____ lots of strange creatures with white skin and large black eyes.
| A．was | B．is | C．were | D．be |