选出能够替换句中划线部分的选项。
a. trouble b. quite worried c. very important d. running aftere. 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.