You should call your parents after the school trip.同义句

After the school trip, you should give your parents a call or a txt message.

You should ask your parents in the school travel。

You ought to give your parents a call when you have finished the shool trip.

You should ask your parents after the school travel

You should call your parents when the school tripis over.
p.s.You should ask your parents in the school travel。是错的
"ask"是"问"的意思,而"call"译为"给某人打电话"