а) 1% от тонны б) 1% от литра в) 5% от 7 тонн г) 6% от 80 км

1) в работе вавилова центры происхождения культурных растений доказано, что первичные очаги происхождения культурной флоры располагались обычно: а) в горной местности; б) в долинах рек; в) на остовах; г) в Южной Амереке; д) в австралии

2) кусочек школьного мела бросили в стакан с бесцветной жидкостью.В стакане забулькало, и мел растворился с образованием прозрачного раствора.Эта жидкость:

а. ацетон    б. вода    в. спирт    г.раствор щелочи    д. соляная кислота

1.Выберите один правильный ответ I can’t fall asleep. – Try … sheep. It could help. counting to counting be counting count 2 Выберите один правильный ответ 0. The plane lands at … at 5 o’clock. Heathrow’s Airport the Heathrow Airport a Heathrow Airport Heathrow Airport 3 Выберите один правильный ответ There are some dark clouds in the sky, it … rain. is going will is going to will be 4 Выберите один правильный ответ My mother was … with the present. delighting delight delighted delightful 5 Выберите один правильный ответ The road repairs … on the motorway might delay traffic. carried out are carried. are carrying carrying out 6 Выберите один правильный ответ The concert … at 5 o’clock. has to begin must begin is to begin can begin 7 Выберите один правильный ответ Jill has got … time now, she is getting ready for her exams. a little little many much 8 Выберите один правильный ответ My watch was among the things … . taken took taking take 9 выберите один правильный ответ 0. The train is not … the plane. as fast as the fastest faster as fast as 10 Выберите один правильный ответ the composition … yesterday. was written has been written was wrote is written 11 Выберите один правильный ответ You can’t be serious, you … be joking! should must are to may 12 Выберите один правильный ответ Tomorrow at 2 o’clock we … in the sea. will swim will be swimming will have swum will swimming 13 Выберите один правильный ответ Your tour guide … for you at the airport at 3 p.m. will be waiting will wait will have been waiting will have waited 14 Выберите один правильный ответ 7. The tourists … to proceed to gate 5. has been welcomed are welcoming welcome are welcomed 15 Выберите один правильный ответ My uncle is … lift this box by himself. enough strong to too strong to strong enough strong enough to 16 Выберите один правильный ответ The box was heavy, you … me to get it home. can have helped may have helped must have helped might have helped 17 Выберите один правильный ответ 5. The dress … by my sister. has been sewn has sewn had been sewn been sewn 18 Выберите один правильный ответ Mike would like … mountaineering. to taking up to take up take up taking up 19 Выберите один правильный ответ 5. Our flight … because of bad weather. delayed had been delayed was delay was delayed 20 Выберите один правильный ответ I … her before but I’m not sure. ought to have met should have met may have met had to meet