1. must
2. can
3. need not
4. cannot
5. Can
<span>1. By what properties are metals distinguished from nonmetals? </span><span><span>d. High conductivity for heat and electricity.
</span> 2. What common metals are produced in great quantities? </span><span><span>a. Iron, copper and zinc.
</span> 3. What metals are called light? </span><span><span>e. Aluminium, berillium and titanium.
</span> 4. What properties do nonmetals have?</span><span><span>b. They are usually poor conductors of heat and electricity.
</span> 5. What is done to protect metals from corrosion? c. They are coated by some organic coatings.
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My next-door neighbours are friendly and easy-going people. Our families often visit each other and we have always tried to keep good relations.
I can always adress to my neighbours when I need their help. They will never refuse my request for help, and I very much appreciate this feature of their character.
My neighbours are benevolent, polite and unobtrusive, - we have no trouble in finding a topic for conversation or understanding each other on some issues.
Though from time to time I have to make a remark to neighbours living above, because their loud music is causing us some issues at nights. However, it is not a serious problem, because they have always turned it off when I asked them to keep it down. And they have always apologized for inconvenience.
So, it could be said that I like ty neighbours very much, they are excellent people !
We was skiing in the Alps when we saw an avalanche
We saw an avalanche while we was skiing in the Alps
They was watching the news when the lights went out
The lights went out while they was watching the news
People was sleeping when the wildfire arrived
The wildfire arrived while people was sleeping
I was going the exercise when the class finished
The class finished while I was going the exercise