the students are going ()their first field trip
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![the students are going ()their first field trip](/uploads/image/z/9511776-0-6.jpg?t=the+students+are+going+%28%29their+first+field+trip)
the students are going ()their first field trip
the students are going ()their first field trip
the students are going ()their first field trip
on 词组go on a trip