6 А 7 С 8 В 9 С 10 А 11 С
<span>1. You </span><span>may visit your friend soon.
2. We </span><span><span>could</span> do it yesterday.
3. I </span><span>can not understand the English language.
4. If you want to be a student you </span><span>must work hard.</span>
XI
2, 3
XII
1. am
2. is
3. are
XIII
1. has
2. have
XIV
1 - a
2 - d
3 - b