11. We know he never takes
12. They think he is learning fast he knows ...he speaks
13. He just works
14. I don't like.... I'm enjoying ...I'm very happy.
15. Do you have any ideas where Rick is.I don' t see him..He is visiting
16. We don't have ...Come in
17.
We also rode the roller coaster, skating and skiing.
<span>1. We have heard about a 10-day expedition to the Ugra National Park.
2. The students</span><span> have participated in volunteer work such as cleaning the springs and paths in the forest.
3. We </span><span> have learnt that most school students in Russia study Ecology and take
part in conferences and even about modern ecological problems.
4. They </span><span> have learnt how to put up tents, make a fare, cut wood and cook on an open fire.
5. They </span><span><span> have </span>learnt how to experience nature by using all their senses.</span>
3. полюбому. ))))))))))))))
"are" - множественное число.
"is" - единственное число.
"is" употребляется с he, she, it.
"are" употребляется с we, they, you.