3、ential [i'senʃəl]1.I am sick of it.2.Pick it up, will you?3.It’s a top hit on the list.它是排行榜的第一名。4.Nothing is impossible to a willing mind.世上无难事,只怕有心人。比较练习:beat[bi:t]bit[bit]sleep[sli:p]slip[slip]cheap[tʃi:p]chip[tʃip]seek[si:k]sick[sik]meal[mi:l]mill[mil]