You should see a doctor. He can help you with your back problem.
A. You should see a doctor who he can help you with your back problem.
B. You should see a doctor which can help you with your back problem.
C. You should see a doctor who can help you with your back problem.

Random Topics:
Kinds of NounsModal Verb in Passive VoicePrepositionAdjectives and VocabularyTime ClauseConditional Sentences and Verb Forma, an, the, zero articleDefinite ArticlesVerb + InfinitivePast Perfect Tense and Past TenseOther quiz:
Present Tenses › ViewThe number of people living in extreme poverty ___ steadily in recent years due to international aid programs.
A. has decreased
B. is decreasing
C. decrease
Prepositions and Adverbs › View
The car drove _________ the old church on the way to the park.
A. along
B. across
C. past
D. down
Adverbs and Phrases › ViewWhich phrase is the adverbial? “We will see you in the morning.”
A. We
B. See you
C. In the morning
D. Morning
Grammar › View
Which sentence has been written incorrectly?
A. There is a shipwreck near the reef.
B. Sam likes to dive there.
C. He sometimes seen the wreck.
D. He is going to explore it today.
