The first astronauts

    Since the earliest times， people have looked up at the stars， the moon and the planets． Today people use modern machines   （1）　　   at the sky． This is very different from the situation   （2）　　 years ago when people could only use their eyes． Perhaps they dreamed of （3）　　 the universe．

When did humans first go into space？ The story began not so very long ago，

（4）　　 the first astronauts were not people﹣they were animals．

    Scientists wanted to make travelling to space as （5）　　   as possible for humans． So they decided to experiment with animals and test （6）　 in spaceflights． Insects， mice， frogs， dogs and monkeys were some of the animals （7）　　 first went into space． Many of them   （8）　　 ， but they helped to make space travel safer for humans． For their great service， we （9）　　 forget these animals．

    Albert Ⅱ was the first monkey to go into space in 1949．Sadly he died （10）　　   his spaceship landed back on Earth．

    （11）　　 the result was different for Ham the Monkey． His story ended happily when he return to earth （12）　C　 very good health．

Scientists wanted to know the answer to the important question：could（13）　　   animal like Ham do the same things in space as he could do on Earth？ The answer came when Ham （14）　　   into space in 1961． Yes， he did everything well and lived for （15）　　 16 years．

（1）A． look	B． to look	C．looking	D． looked
（2）A． thousand	B． thousands	C． thousand of	D． thousands of
（3）A． explore	B． to explore	C．explored	D． exploring
（4）A．as	B． or	C． but	D． so
（5）A． safe	B． safer	C． safest	D． the safest
（6）A． they	B．them	C． their	D． theirs
（7）A． whom	B． what	C． that	D． whose
（8）A． die	B． died	C．have died	D． will die
（9）A． shouldn't	B． may not	C．don't have to	D． needn't
（10）A．if	B．because	C． after	D． since
（11）A． Luck	B． Lucky	C． Luckier	D． Luckily
（12）A． at	B． on	C． in	D．for
（13）A． a	B． an	C． the	D．/
（14）A． send	B． sent	C． is sent	D． was sent
（15）A． another	B．other	C． others	D． the others