Question

I’m putting on weight. The doctor has warned me to _________ sugar.

1. A.
   keep up
2. B.
   keep back
3. C.
   keep off
4. D.
   keep away

Answer 1

C
keep off有“不接近、避免”等意思，在此题中是“不(吃、喝)”之意，又如：keep off cigarettes /drink /fatty food不抽烟/不喝洒/不吃油腻食物。keep up“不低落、维持”；keep back“阻止、不将某物给某人、隐瞒”；keep away“不靠近”。