1 . The one in the new environment should be sympathetic to the fact that your friend may feel ________ (abandon). (所给词的适当形式填空)

2 . Learning about the requirements of each plant can be very ________(reward). (所给词的适当形式填空)

3 . Unluckily, my pet was killed in an accident. You can imagine how________________ (sorrow) I am now! (所给词的适当形式填空)

4 . What’s more, indoor plants are easy to look after and are not very ________________ (expense). (所给词的适当形式填空)

5 . The knife is not ________enough so it needs to be ________, which I think will ________improve your work efficiency.(sharp) (所给词的适当形式填空)

7 . Little Tom was ________ (急于知道) the result of his examination. (根据汉语提示完成句子)

8 . It had been raining for four days when we arrived so that the roads were very ________ (mud). (所给词的适当形式填空)

9 . On the first day of school, Han Jing didn’t feel ________ (frighten) at all, because she believed she would make new friends there. (所给词的适当形式填空)

10 . The festival La Tomtina is ________ (interest) because people eat tomatoes and throw them at each other! (所给词的适当形式填空)