a．Providing that

b．On condition that

c．Say

d．Allowing that

8  The computer will be incapable ______ whether Princeton will have sun or rain one month away.(11.13)

a．predict

b．to predict

c．of predicting

d．predicting

Vocabulary  词汇

9  The world's best weather forecasts are based on _______．(1.1)

a．certain knowledge

b．guess work

c．scientific facts

d．accurate calculation

10  The modern weather models work with a _____ of points.(1.7)

a．scale

b．balance

c．line

d．network

11  ‘Humidity’ refers to ______．(1.11)

a．light

b．water vapour

c．pressure

d．heat

12  An infinitely powerful computer takes in all the data and _____ what will happen．(11.11-12)

a．predicts

b．foretells

c．estimates

d．works out