1A VOCABULARY

very strange and unusual W___

the main reason for something THE P___ ___

unexpected, surprising or strange E___

to confuse somebody completely TO B___

friendly competition G__ R__

to find the correct answer or explanation for something TO S___

a mark, object or sign that shows that somebody or something existed or was present T___

far away from places where other people live R___

person who knows a lot about a particular subject G___

a strong sense that something is right or true, but you can give no good reason why G___ ___

so easy to use that it cannot fail or be used wrongly F___

the number of hours per week you spend working compared with the number of hours you spend with your family, relaxing, etc. W___ ___

something that is difficult to understand or explain (syn. mystery) P___

not serious, cheerful and not worried about anything L___

person looking for employment J___