谁帮忙做一下这些英语题（不要出现语法错误）加急！！！！！

All languages _have been changed_____(change) over a period of time.
English _is developed____(develop) very rapidly.
How many people ___speak_______(speak) Chinese.
I ____don't think___(not think) American English is very different from British English.
Millions of people ____watch___(watch) satellite TV every day.
The percentage of non-English web pages ___grow_____(grow).
What languages _____do___people___watch___(watch) satellite TV every day.
问题补充：1English grammar has not changed much __since_______the time of shakespeare.
The American spelling system has existed______for____ about 200 years
I have been studying English ___since_____I was in primary school.
We ve an american teacher He has been here _____since______Jaunary.
CNN has been on the air _____for____ more than twenty years.
Monita rajpal has worked for CNN _____since____the year 2000

will change ,develops,speake,don't think,watch,grows,do grow,from,for,since,for,since

have changed; has developed; speak; don't think; watch; is growing; do...watch 此题有错误;
during; for; since; since; for;
since

change
develops
speak
don't think
watch
grow
do watch (这个不太确定)