OZONE IS AN UNSTABLE (A) , FAINTLY BLUISH GAS THAT IS (B) THE MOST...
55.Ozone is an unstable (A) , faintly bluish gas that is (B) the most chemical (C)
active form of (D) oxygen.
Insert a preposition in each gap to complete the following passage.
According to some scientists, high-risk sports can be valuable (56)___________ certain
types of people. Such activities help them learn that being frightened doesn’t mean that
they have to lose control. The recent fashion (57)_____________ jumping from bridges
attached (58)_______ a length of elastic rope, known as “bungee jumping”, has now been
tried (59)________ millions of people over the world, and interest (60)____ it is
continuing to grow. Before the special elastic rope is tightened (61)________ them,
jumpers reach speeds of nearly 160 kph. First-timers are usually too terrified to open their
mouths, and when they are finally lowered safely (62)_________ the ground, they walk
around with broad smiles (63)_________ their faces, saying repeatedly how amazing it
was. However, for some people, it is only the embarrassment of refusing to jump
(64)_____ the last minute that finally persuades them to conquer the fear of heights and
push them off (65)_____ space.
Complete each of the following sentences in such a way that it means exactly the
same as the sentence before it.