37 I was having a fever this morning so I called________ sick today.
(A) around
(B) about
(C) off
(D) in

call in sick 打電話到公司請病假
A: Why didn’t John show up today?
A: 為什麼 John 今天沒出現？
B: He just called in sick this morning.
B: 他今天早上打來請病假了。

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和請假有關的常用單字與片語：

ask for leave 向…請假
grant leave 准假
on leave 告假中
leave request form 假單

資料來源

感謝【覚】 大大的答案分享...
但還是要說!販售真的太多了...看得都很煩....

我相信題目一句話應該都看得懂...白話就是：我早上發燒要請病假...的意思
本人針對選項查了一下...
called around   到處致電---有到處拜會之意
called about     打聽；詢問
called off          取消；喊走(舉例：Call off your dog, will you?把你的狗喊走, 好嗎?)
called in            請求之意(這邊與題目是連結的片語，call in sick代表打電話請病假之意)

I was having a fever this morning so I called in sick today.
今天早上我發燒了，所以今天請了病假。