Translation:The boys and the girls read a book.
In present tense lezen is regular, only the singe/double e and the s/z change because of standard spelling rules. Since you're asking your question pretty early in the tree I assume you have issues with the spelling, not with the different tenses, these are the conjugations of lezen in the present tense:
- ik lees
- jij/u leest (lees jij)
- zij/hij/het leest
- wij lezen
- jullie lezen
- zij lezen
However, if you're having issues with tenses: in the past tense lezen is irregular see here (you have to enter lezen in the text box and press "go").