A) has to get B) were to get
C) had got D) could have got
45 I felt somewhat disappointed and was about to leave, ________ something occurred which attracted my attention.
A) unless B) until
C) when D) while
46 A love marriage, however, does not necessarily ________ much sharing of interests and responsibilities.
A) take over B) result in
C) hold on D) keep to
47 The ability to store knowledge makes computers different form every other machine _______ invented.
A) ever B) thus
C) yet D) as
48 I’m not sure whether I can gain any profit from the investment, so I can’t make a(n) ______ promise to help you.
A) exact B) defined
C) definite D) sure
49 I have kept that portrait ____________ I can see it every day, as it always reminds me of my university days in London.
A) which B) where
C) whether D) when
50 The sports meet, originally due to be held last Friday, was finally _______ because of the bad weather.
A) set off B) broken off
C) worn off D) called off
Part III Reading Comprehension (35 minutes)
Direction: There are 4 passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B) C) and D). You should decide on the best choice and mark the corresponding letter on the Answer Sheet with a single line through the center.
Passage One
Questions 51 to 55 are based on the following passage:
Space is a dangerous place, not only because of meteors（流星）but also because of rays from the sun and other stars. The atmosphere again acts as our protective blanket on earth. Light gets through, and this is essential for plants to make the food, which we eat. Heat, too, makes our environment endurable. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage.
