Ответ:
A6, B1, C4, D2, E7, F3, G5
Объяснение:
A) An action which was in progress before another action in the past - The Past Perfect Continuous form, в тексте только 1 вариант Had been trying
B) An action that happened at a certain time in the past. - Past Simple, однократное действие (decided)
C)An action which happened before another action in the past. - Past Perfect (had twisted and fallen before they could help)
D) Action which was in progress in the past and another action interrupted it. - Past Continuous (were climbing... when a voice screamed)
E) An action which had recently finished and whose result was still visible. - Past Perfect (had abandoned)
F) Actions which happened one atter another in the past. - Past Simple (stopped and checked)
G) Two or more actions happening at the same time in the past. - Past Continuous (was hanging... while the climbers were struggling)