從方框內(nèi)選出能夠替換句中劃線部分的選項(xiàng)。
A. trouble  
B. quite worried  
C. very important  
D. running after    
E. waste things
(     ) 1. The dog likes chasing the chick.
(     ) 2. It's crucial that we study English well.
(     ) 3. She's anxious because of the test.
(     ) 4. Xiao Ning found garbage in front of the house.
(     ) 5. Don't bother your father. He is busy with his work now.
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