Question

I often study ________ a test ________ asking the teachers ________ help．

1. A.
   for; by; to
2. B.
   for; by; for
3. C.
   to; for; for
4. D.
   by;for;to

Answer 1

B
study for意思是“为……而学习”；介词by意思是“通过；凭借”；ask…for help是一固定词组，意思是“向……求助”。