Identify the mistake in each of the following sentences:
Câu 1: I took an hour rewriting my essay in a more convincing way as the teacher had recommended.. 
         
         A. took                  
         
         B. in
         
         C. as
         
         D. had recommended
Câu 2: Annie, that I met in the summer camp, has become my best friend
         
         A. that                   
         
         B. the
         
         C. has become       
         
         D. my best
Câu 3: It was not until Kate telephoned the Customer Service Assistance did she receive the refunds.          
         
         A. not until            
         
         B. telephoned
         
         C. did she receive
         
         D. refunds
Câu 4: My father never allows me going out after 10pm even though I am now 22. 
         
         A. allows            
         
         B. going
         
         C. after     
         
         D. even though
Câu 5: I do not think you can put the washing machine here, for it takes on a lot of space. 
         
         A. do not think            
         
         B. can
         
         C. for 
         
         D. on 
A.
B.
C.
D.