Misc: Where are the Guiana Highlands?

Questions

In 1973 The ---------- oil embargo begins. It will last until March, 1974. ?

In 1973 The Arab oil embargo begins. It will last until---------- , 1974. ?

In 1977 ---------- commandos storm a hijacked Lufthansa airliner in Mogadishu, Somalia, freeing all 86 hostages aboard and killing three of the four hijackers. ?

In 1977 West German commandos storm a hijacked ---------- airliner in Mogadishu, Somalia, freeing all 86 hostages aboard and killing three of the four hijackers. ?

In 1977 West German commandos storm a hijacked Lufthansa airliner in---------- , Somalia, freeing all 86 hostages aboard and killing three of the four hijackers. ?