I can’t spend _________ money on the car which is _________ expensive for me.

I can’t remember when I started collecting litter. But it was when I got tired of seeing litter nearby and ___1___ that no one else was going to pick it up.
I live near a forest in Ohio, America. I can walk there ___2___ three minutes. I used to love going there to play with my dog. But one day there was ___3___ much litter there that I became very unhappy. I decided I had to clean up the forest. I wanted to feel happy ___4___ there again.
I __5___ my first trip to clean the forest that afternoon. I took a big black rubbish bag with me. Ten minutes after starting to pick up litter, my bag was ___6__! It had cans, bottles, broken glasses and newspapers in it. From then on, I went to the forest four times a year to pick up litter. I’m often there for three hours. It makes me feel ___7___ to do something for the environment.
After each trip, I look at all the litter that I’ve found. If ___8___ of it is recyclable(可回收的) , I keep it. I can’t understand ___9___ people drop litter. But I will keep picking it up until they stop dropping it. I know I am only doing a small bit to ___10___ the earth, but I still think it is important.

--I can’t solve the math problem because it is too difficult. What should I do?

?????? -- _________ ask the teacher for help?

A. How about??? B. What about??? C. Why don’t you?? D. Why not you

I can’t play soccer because I have ______ homework today.

A. too much        B. too many       C. much too

I can’t play the piano, and _______.

A. neither can my sister                                B. my sister can’t, too

C. so can’t my sister                                        D. can my sister, either