Not (A) single alphabet has ever perfectly (B) represented the (C) sounds of any of (D) Earth’s natural languages.
A.Not
B.perfectly
C.the
D.any of

Artificial (A) intelligence is concerned with designing (B) computer systems that perform such tasks as reason (C) and learning (D) new skills.
A.Artificial
B.designing
C.reason
D.learning

Astronomers do not have sufficient information (A) to determine (B) what (C) the solar system was created
A.information
B.to determine
C.what
D.was created

Pure solium immediately (A) combines (B) with oxygen when is exposed (C) to air
A.immediately
B.combines
C.is exposed
D.to air

The (A) little boy’s mother bought him (B) a five – speeds (C) racing bicycle for his (D) birthday.
A.The
B.him
C.five – speeds
D.for his

Danny spent such enjoyable (A) vacation in Europe this summer that he (B) plans to return (C) as soon as he saves enough money.(D)
A.such enjoyable
B.that he
C.to return
D.saves enough money

Paul did so (A) well in his speech today that (B) he should have rehearsed (C) it many times this past week.(D)
A.so
B.that
C.should have rehearsed
D.this past week

The teachers and the administrators are having such difficult (A) time agreeing on (B) a contract for the forthcoming year (C) that the teachers may go on strike.(D)
A.such difficult
B.on
C.the forthcoming year
D.may go on strike

It is difficult (A) to get used to sleep (B) in a tent after having (C) soft, comfortable bed to lie on.(D)
A.difficult
B.to sleep
C.having
D.to lie on

Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage.
WHALES
How far would you travel for a good meal? If you were a humpback whale, the answer would be five thousand miles. These large sea animals travel at least that far from their winter home off the (16)___________ of Columbia to their summer (17)___________ areas off Antarctica. The distance covered by some types of whale is amazing, especially when you (18) _______ their enormous size. The blue whale is the largest animal that has ever lived and it can weigh as much as thirty elephants. It (19)_________ as no surprise, therefore, to hear that ancient folk legends tell of sailors mistaking these creatures for islands. The more we find out about whales, the more wonderful they seem. Some species can hold their breath for more than an hour and dive to a depth of over 200 metres. They use a system of sounds known as echolocation to find the fish they eat and they have further sounded to keep in (20) _____ The noises they produce can travel hundreds of miles under water. Some species seem to sing complicates songs which consist of a number of separate themes, sung in a specific order which can last up to half an hour or more. If you ever get the chance to see one of these great creatures in the wild, you will understand why they have inspired so many legends.
A.consider
B.think
C.view
D.believe