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On 4 October 1957 the first satellite, Sputnik, was launched. Since then, thousands of spacecraft have been sent (26)______space. Every few weeks new satellites are put into orbit. Unfortunately, space is being (27)______ by debris from these space flights. More than 70,000 objects have been left in space. Parts of rockets have been left. Old satellites have been abandoned. Other items, including a glove, a spanner and a camera, have been (28)______ by astronauts. The situation up there is becoming dangerous. Both Russian and American spacecraft have been destroyed. (29)______astronaut would be killed if he or she was hit by a piece of rubbish. It would cost billions of dollars to collect all the debris, but if nothing is done the (30)______ will only get worse. Sooner or later a satellite will be damaged by a large piece of rubbish and thousands more pieces of debris will be scattered.

26. A. to                 B.into               C. from                             D. with

27. A. polluted       B. ruined          C. destroyed                     D. dirtied

28. A. missed         B. gone             C. thrown                         D. lost

29. A. An               B.a                    C. the                                D. 0

30. A. state             B. place            C. situation                       D. position