have a school trip是否等于have a picnic

have a school trip是否等于have a picnic go on a picnic等于have a picnic,have a trip等于take a trip When 什么 you have a school trip ___________ ___________ you have a school trip 短语have a picnic等于什么? 词组：have a picnic to have a picnic have a picnic have a picnic是什么意思 have a picnic音标 关于have a picnic they will have a picnic next month（用have a trip改为选择疑问句）