Part III. Give the correct form of the words in brackets. (2.0 points)

EX. Knowing English well is very (use )........ -> useful

1. The length of the experiment is about 20 minutes (LONG)

2.She sent her best wishes for my future happinest (HAPPY)

3. The leaves of this tree are very green and beautiful. ( LEAF )

4. Every year I make a resolution and every year I break it. (RESOLUTE)

5. I don't believe that the first-footer can bring us good or bad luck.(FOOT)

6. That's a creative designer. She has a lot of new ideals.(CREATE)

7. Nhung is quiet,but sometimes she becomes talkative (TALK)

8. They're famous football players (PLAY)

9. They are talking about their lesson. (TALK)

10. She told me she would comes so be patient (PATIENCE)

I ought to tell you about...

2. Phương trình có nghiệm kép:

\(\Leftrightarrow\Delta'=0\\ \Leftrightarrow m^2-\left(m-1\right).3=0\\ \Leftrightarrow m^2-3m+3=0\left(1\right)\)

Giải phương trình \(\left(1\right)\) ta được:

\(\Delta_m=3^2-4.1.3=-3< 0\)

\(\Rightarrow\) Phương trình \(\left(1\right)\) vô nghiệm.

Vậy không có giá trị nào của \(m\) thoản mãn để phương trình có nghiệm kép.

1. Phương trình có hai nghiệm phân biệt:

\(\Leftrightarrow\Delta>0\\ \Leftrightarrow5^2-4.m.\left(-3\right)>0\\ \Leftrightarrow25+12m>0\\ \Leftrightarrow12m>-25\\ \Leftrightarrow m>\dfrac{-25}{12}\)

1. Phương trình có nghiệm kép

\(\Leftrightarrow\Delta>0\\ \Leftrightarrow5^2-4.m.\left(-3\right)>0\\ \Leftrightarrow25+12m>0\\ \Leftrightarrow12m>-25\\ \Leftrightarrow m>\dfrac{-25}{12}\)

Complete the sentences with "and, so, but, before, then, after,, because":

I got out of the car and walked into the house.

Environmental pollution is a term that (1) refers to all the ways by which man pollutes his surroundings. Man dirties the air with (2) exhaust gases and smoke, (3) poisons the water with...

1. Four countries have been visited (visit) by John so far.

2. London has (have) a population of eight million people.

3. The Statue of Liberty in New York in a moument which symbolizes (symbolize) freedom.

4. He(A) said he would go(B) to(C) England next week(D).

=> the next week

5. Nam(A) wishes(B) he can speak(C) English fluently(D).

=> could speak

VI. Read the text below and look carefully at each numbered line. Some of the lines are correct, and some have a word which should not be there. If the line is correct, put a tick (√) by the number. If the line has a word which should not be there, write that word by the number. There are two examples at the beginning (0 and 00). (5pts)

A load of rubbish

Ex1: Complete the conditional sentences, using the given information:

1. You should take exercise regularly because it is the way to get fit.

=> If you take exercise regularly, you will get fit.

2. I can't look the word up because I don't have a dictionary.

=> If I had a dictionary, I could look the word up.

3. I don't have his phone number, so I don't phone him.

=> If I had his phone number, I would phone him.

4. You may want a help, just give me a ring.

=> If you want a help, you must give me a ring.

5. It is raining, so we won't finish the game.

=> If it weren't raining, we would finish the game.