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1. The advanced course is ________ to those who have already taken the introductory course. 
A. worked out
B. approached
C. limited
D. required
2. If the rain _________, we'll have to cancel tonight's plans.
A. continues
B. expects
C. avoids
D. requires
3.Each student should receive a _________ amount of the prize.
A. fair
B. powerful
C. worth
D. confused
GRAMMAR
4. There is always a lot of traffic here, but today the traffic is bad. The traffic today is _________ usual. 
A. worse than 
B. badder than 
C. bad  
D. the worst 
5. I find your essay difficult to understand, so can you write _________?
A. clearer 
B. more clear 
C. clearly 
D. more clearly 
6. A: “This knife isn’t very sharp. Do you have a _________ one?”  
B: “No, that’s _________ I have.” 
A. sharp - sharper 
B. sharper – the sharpest 
C. sharper – the most sharp 
D. the sharpest – the sharpest 
7: When a tire is punctured, the driver ________ change the wheel.   

A. needn’t 

B. need to 

C. needs to 

D. needn’t to