1. Anna (look) at the departure board while the twins (stand) in the queue. 2. Eram (not/have) anywhere to live.
3. Daniel (show) the tribesmen round the park when they (start) hunting squirrels.
4. Max (already/wait) for six hours, before they (announce) the reason for the delay.

1. Anna WAS LOOKING at the departure board while the twins WERE STANDING in the queue. (Past Continuous, так как мы говорим об одновременных действиях + есть слово-подсказка while (пока/в то время как)

2. Eram DIDN'T HAVE anywhere to live.

(Past Simple, т. к. говорится о каком-то моменте в )

3. Daniel WAS SHOWING the tribesmen round the park when they STARTED hunting squirrels.

(Past Continuous и Past Simple, так как несколько действий в происходили в одно время.)

4. Max HAD already BEEN WAITING for six hours, before they ANNOUNCED the reason for the delay.

(Past Perfect Continuous, так как есть слово-подсказка: for (в течение…) и идет обозначение первичного действия, т.е. которое началось раньше;второй глагол в Past Simple, так как какое-то действие произошло в )