Choose the best alternative according to the text.

What happened at Pearl Harbor?

    On the morning of 7 December 1941, at 7.55am local time, 183 aircraft of the Imperial Japanese Navy attacked the United States Naval base at Pearl Harbor on the island of Oahu, Hawaii.

    The first attack wave __________ bombing the hangars and parked aircraft of the island’s airfields while at the same time launching torpedoes against the US warships moored in the harbour.

    This devastating attack was followed an hour and a half later by a second wave of 170 Japanese aircraft. Within two hours, 18 US warships had been sunk or damaged, 188 aircraft destroyed and 2,403 American servicemen and women killed.

Adapted from https://www.iwm.org.uk/history/what-happened-at-pearl-harbor.