Travellers -- their reservations well in advance if they want to fly during the Eid holidays.

Travellers -- their reservations well in advance if they want to fly during the Eid holidays. Correct Answer had better get

After had better, the present form of verb is used.

Related Questions

. Travellers their reservation well in advance if they want to fly during the Eid holidays
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Travellers their reservations well in advance if they want to fly during the summer holidays.
Travelers .... their reservations well in advance if they want to fly during the Eid hoildays.
Tourists........ their reservations well in advance if they want to fly during the Eid holiday.
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Fill in the blank : Tourists ---- their reservations well in advance if they want to fly to Cox's Bazar.