Постройте какой-нибудь параллелограмм: а) со сторонами, равными 3 см и 4 см; б) с диагоналями, равными 5 см и 4 см.

1 . I have never understood why they agreed to be roommates in the first place.
2. Al just introduced me to his sister. Now I have met everyone in his family.
3. Ms. Ericson has been standing at the sales counter since eight o’clock this morning.
4. I am so happy! I finally got the one thing that I have always wanted.
5. My uncle has been painting the outside of his house for three weeks, and he’s still not finished.
6. The Smiths are presently in Tunisia. They have been travelling throughout North Africa since the middle of May. They’ll return home in another month.
7. My brother’s daughter has grown nearly six inches since I last saw her two years ago.
8. A: How much money do you have to buy clothes with?    B: Sixty dollars.  A: I thought you had a hundred dollars.   B: I did. But I have already spent forty.
9. A: Isn’t the rice ready to eat yet? It has been cooked for over an hour, hasn’t it? Are you sure you know how to cook rice?  B: Of course I do! I’ve watched my mother make rice for years.
10. As far as I can remember, I have never heard him say “I’m sorry” before.
11.  We have been waiting to hear about the new baby since 5 a.m.
12. Mr. Turtle has been digging a long trench across the middle of his yard for the last two hours.