| Nowadays people are able to create crops with more advantageous characteristics through the use of plant breeding and hybridization. | ||
| At present its possible to increase yield, improve disease resistance, drought tolerance, and their gustatory qualities of plants. | |||
| Careful selection and breeding have enormous effects on high yields irrespectively of climatic and cultivation techniques. | |||
| Crop alteration through breeding practices which changes the genetic plant structure has been practiced by people for thousands of years. |
:
, , , , .
, , (Altering crops through breeding practices changes the genetic make-up of a plant to develop crops with more beneficial characteristics 1), , (Domestication of plants has, over the centuries increased yield, improved disease resistance and drought tolerance, eased harvest and improved the taste and nutritional value of crop plants 2). , (Variations in yields are due mainly to variation in climate, genetics, and the level of intensive farming techniques 3).
, Nowadays people are able to create crops with more advantageous characteristics through the use of plant breeding and hybridization ( , ).
N 17
:
We ________ pay for the tickets as Fiona won them in a competition.
|
| didnt have to | ||
| mustnt | |||
| couldnt | |||
| hadnt to |
N 18
:
The scientists said that they had an announcement of international
|
| importance | ||
| importanty | |||
| importation | |||
| important |
N 19
:
My new job is ______ than the old one. I work fewer hours and earn more.
|
| far better | ||
| the best | |||
| bad | |||
| worse |
|
|
|
N 20
:
I wanted to say goodbye to Jerry, but he
|
| had already left | ||
| was already left | |||
| already left | |||
| had already been leaving |
N 21
:
There wasnt __________ in the garden.
|
| anybody | ||
| somebody | |||
| nobody | |||
| everybody |
N 22
:
The answer ________ from the sellers greatly surprised us.
|
| received | ||
| receiving | |||
| having received | |||
| to have received |
N 23
:
He speaks English perfectly ________ he has never been to England.
|
| though | ||
| since | |||
| as if | |||
| for |
N 24
:
Were out of ________, so could you get some from the supermarket?
|
| coffee | ||
| a coffee | |||
| an coffee | |||
| the coffee |
N 25
:
Success in this industry depends a lot ________ luck!
|
| on | ||
| with | |||
| at | |||
| from |
N 26
:
When we got to the airport we learned that our flight
|
| had been delayed | ||
| was delayed | |||
| delayed | |||
| will be delayed |
N 27
:
Bad news _______ people happy.
|
| doesnt make | ||
| dont make | |||
| are not making | |||
| is not making |
N 28
:
The professor being ill, the lecture was
|
| put off | ||
| put back | |||
| put away | |||
| put forward |
N 29
:
, .
A.: May I ask you a question?
B.: __________________.
|
| Certainly. | ||
| Im afraid, I cant. | |||
| How kind of you. | |||
| Sorry, I dont know. |
N 30
: -
, .
Manager: Have you typed the cover letter yet, Mrs. Black?
Secretary: _______________.
|
| Yes, sir. Its on your table. | ||
| Im busy. | |||
| Im not sure. | |||
| Yes, pal. You can find it on your table. |
|
|
|
N 31
: -
, .
Student: Im about to finish my course of studies, but I dont know what to do: study further or take a job.
Teacher: _______________.
|
| You should continue your studies, Im sure. You are really talented. | ||
| That sounds like a good idea. Go ahead! | |||
| Thats a problem. It is for you to decide. | |||
| I think youd better study further. |
N 32
: -
, .
Customer: Show me this lipstick, please. Does it suit me?
Shop-assistant: _______________.
|
| Yes, madam, it suits you perfectly. | ||
| Why should I tell you? | |||
| Not at all. | |||
| I dont know. |
