【单选题】The ____ from tourism is the biggest single contribution to GDO in the Maldives; every year many tourists from all corners of the world spend their holidays there.
【简答题】The____(收入)from tourism is the biggest single contribution to GDP in the Maldives; every year many tourists from all corners of the world spend their holidays there.
【单选题】The ________ from tourism is the biggest single contribution to GDP in the Maldives; every year may tourists from all corners of the world spend their holidays there.
【单选题】The_________ from tourism is the biggest single contribution to GDP in the Maldives; every year many tourists from all comers of the world spend their holidays there.