The Italians, in panic, 19 the main exit in their section when a six-foot concrete wall collapsed.
答案：(A) headed for
headed for the main exit（朝主要出口奔去）表示義大利球迷驚慌之下衝向出口，此時一道六英呎高的水泥牆倒塌；backed up（回堵、滯留／支援）、called out（大喊）、passed on（傳遞）均不符合此處衝向出口的語境。
四個選項都是「動詞加介副詞」的片語動詞，形態一模一樣，你會一個一個把中文代進去讀。
鑑別度高達 55。先看空格後面接的是什麼：the main exit（該區的主要出口），是一個地點。再看主詞與情境：The Italians, in panic（義大利球迷驚慌之下）——人在慌亂中，對著一個出口能做的事就是往那裡衝。四個選項裡只有 head for 是「朝……而去、前往」，後面接的正是目的地，填進去讀成 headed for the main exit（朝主要出口衝過去）。head 當名詞是「頭」，當動詞就是「把頭朝向那邊走過去」，兩個意思接得起來。
back up（支援；倒車；備份）後面接的是被支援的人或資料，不是地點；call out（大聲呼喊）後面接的是喊出來的話或被叫的人；pass on（傳遞下去）後面接的是被傳遞的東西。三個都是片語動詞，形態吻合，容易被順手選走，但把 the main exit 放進去都讀不成句子該有的意思。
head for（朝……而去、前往）、in panic（驚慌之下）、back up（支援；倒車）、call out（大聲呼喊）、pass on（傳遞下去）、collapse（倒塌、崩塌）。
In 1985, a riot at a Brussels soccer match occurred, in which many fans lost their lives. The 16 began 45 minutes before the start of the European Cup final. The British team was scheduled to 17 the Italian team in the game.
Noisy British fans, after setting off some rockets and fireworks to cheer for 18 team, broke through a thin wire fence and started to attack the Italian fans. The Italians, in panic, 19 the main exit in their section when a six-foot concrete wall collapsed. By the end of the night, 38 soccer fans had died and 437 were injured. The majority of the deaths resulted from people 20 trampled underfoot or crushed against barriers in the stadium.
As a result of this 1985 soccer incident, security measures have since been tightened at major sports competitions to prevent similar events from happening.