1. Did you sleep in open air?
2. Did you play chess that night?
3. Did you study chemistry at the institute?
4. <span>Does your friend call on you last week?
5. Does your sister spend her holidays in the Crimea?
6. Did you took a bus this morning?
7. Did you enjoy the performance?
8. Did you see me yesterday?</span>
<span>It would be useful to investigate this problem. 2 There would be
no results without these experiments. 3 He suggested that you should this
article. 4 I wish I would be about. 5 It is important that you would take part in this
experiment. 6 I brought a book for you so that you could read it. 7 If I were you I would attend this lecture. If you visited the Library you would get some more
information about it. 9 If you had visited the library you would have got some more
information about it. 10. It would be difficult to enter this university.</span>
Twenty books
seventeen pens
nineteen pencils
fifteen pencil cases
Это: ползать, медленно, с трудом продвигаться