6.The (long).............length................... of the experiment is 20 minutes.
7.My aunt works as a(chemistry)..............chemis..............at a university
8.Pupils are very interested in outside class(act).........activities..........
9.Some people play sport to be (health)......healthy........not because they like it
10.Sometimes we are bored and(sleep).........sleepy......... with his long
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