1 : The detective story is sometimes called 'whodunit' because the reader has to work ......... who did it, who committed the crime.

in
out
off
over

2 : The skill of course of the writing is how many times a reader can be sent up ......... alleys.

short
twisted
blind
long

3 : Another way of putting this is how many red ......... the author can throw in the reader's path.

fish
sharks
cod
herrings

4 : The idea is to keep the readers in a permanent state of ......... so that they never know what's going to happen next.

suspense
suspension
suspending
suspenders

5 : As the plot ........., you find yourself agreeing with one character's solution and then another's.

undoes
unfolds
unties
unfurls

6 : As a result you feel as if you are walking in a ......... since at each turning you come to a block end.

muddle
mess
maze
mist

7 : One of the best known detectives is Agatha Christie's Hercule Poirot who uses what he calls his little grey ......... — his brains.

molecules
cells
particles
atoms

8 : Invariably Poirots calls all the ......... together in the last part of the story.

suspicions
suspecting
suspected
suspects

9 : One by one he ......... the innocent until finally the murderer is unmasked.

extinguishes
excludes
eliminates
exerts

10 : The thing that always surprises me is the fact that the murderer bothers to take ......... in the final meeting.

partition
part
parting
parted

11 : Anyone seeking ......... of life on Mars is likely to be disappointed.

clarity
evidence
witness
index

12 : Scientists have been ......... through data from an orbiting satellite.

combing
scratching
brushing
scaling

13 : It seems that Mars has always been cold and icy and that it's not true that oceans have ......... on the planet in its early history.

shaped
figured
contoured
formed

14 : This ......... in the life on Mars argument comes just when it is closest to Earth in 60.000 years.

turn
twist
corner
angle

15 : Because it is coming so close observers are hoping to settle the argument about life on the planet once and for ..........

everything
every
all
altogether

16 : A spacecraft is heading for the planet with a device that will ......... into the soil to sniff for proof of any life.

hole
swim
burrow
turn

17 : Researchers are also looking into the possibility of one day launching a manned ......... to Mars.

sending
mission
destination
explore

18 : As the planet gets nearer to the Sun, enormous dust storms can be whipped ..........

over
on
in
up

19 : Unfortunately the dust storms tend to ......... the view of the planet.

fog
obscure
confuse
darken

20 : Everyone hopes that Mars will remain dust free otherwise people will only be able to see an orange ..........

blot
block
blob
blab


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