______ is clear is that some voluntary code of practice among scientists has to be agreed.
[     ]

A. As          
B. That              
C. What            
D. It

Actually, ____ works hard can be ____ he wants to be, whether it is a pilot, an engineer or a manager.
[      ]
A. anyone; whoever              
B. whoever; whatever    
C. who; no matter what            
D. no matter who; whomever
Loulan City is not at all ________ a traveler who has never seen the desert before can expect.  
[     ]
A. that          
B. where        
C. what        
D. which
Hearing the news, I realized          terrible problems we would face.   
[     ]
A. how        
B. which        
C. what          
D. that
The shocking news made me realize _______ terrible problems we would face.
[     ]
A. how    
B. what    
C. that    
D. why
The other day, my father drove his car at ______ I thought was a dangerous speed.
[     ]
A. as            
B. that        
C. which      
D. what
The output of the gold mine is now four times _____ it was before liberation.
[     ]
A. that            
B. what            
C. which        
D. than
____ she couldn't understand was ____ fewer and fewer students showed interest in her lessons.
[     ]
A. What; why    
B. That; what    
C. What; because  
D. Why; that
— I'm afraid I have to give it up.?
— Remember ______ sticks to his work will succeed one day?
[     ]
A. who  
B. whom    
C. whoever    
D. no matter who?
The how-to book can be of help to _____ wants to do the job.

[     ]

A. who
B. whomever
C. no matter who
D. whoever
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