1、Scientists are now working ( ) humannoids. Because they can help people a lot.
A on B against C into D to
2、People don't feel like doing simple jobs over and over again.
People _____ _____ ______ _____ do simple jobs over and over again.
3、Don't throw g____ about. We should protect the environment around.
4、The girl is always e_____.She's a hard —working girl.
5、Tomorrow we'll go on a p____ in the country.Please bring some food and drinks.