Enshi is becoming a tourist city．________ people come here during the holidays every year．

1. A.
   Thousand of
2. B.
   Thousands of
3. C.
   Five thousands of
4. D.
   Five thousands

Enshi is becoming a tourist city． _________ people come here during the holidays every year．

A．Thousand of                              B．Thousands of

C．Five thousands of                       D．Five thousands

I can’t remember when I started collecting litter. But it was when I got tired of (1)_____litter nearby and realized that(2)_____ was going to pick it up.
I live near a (3)_____ in Enshi, Hubei Province. I can walk there in three (4)_____! I (5)______ love going there to play with my dog. But one day there was so much litter there that I became very unhappy. I decided I had to clean up the forest. I wanted to (6)______ happy going there again.
I made my (7)_____ trip to clean the forest that afternoon. I took a big black rubbish bag with me. Ten minutes (8)_____ starting to pick up litter, my bag was full! It had cans, bottles, broken glass and newspapers in it. From then on, I went to the forest four times a year to pick up the litter. I often (9) ______ there for three hours. It makes me feel 10)_____ to do something for the environment.
After each trip , I(11) _____all the litter that I’ve found. If (12)______ of it is recyclable(可回收的), I keep it. I can’t (13)_____ why people drop litter. But I will keep picking it (14)_____ they stop dropping it. I know I am only doing a small bit to help(15) ______, but I still think it is important.