at

          II/Choose  the best answer by circling A, B, C or D: 

1.     My father ..................to the zoo tomorrow .

A. go           B. will go                       C. goes           D. went

2. If we cut down more forests, there..............more floods

A. are          B. have been                            C. were                 D. will be

3. They cancelled  their picnic ...........the weather was bad

          A. because            B. when                        C. but              D. or       

4.  .........the programme is late, we will wait to watch it.

A. Because            B. Although          C. When             D. So

5.That is ............................book i have ever read .      

A. the borest             B. the boring    C. the most boring D.the  most bored

6. It is getting light .Shall I turn    ............the light to save electricity

A. off          B. up C.on            D. down

  7, The 3Rs ........................for Reduce , Reuse  and Recycle.

          A.stand    B.sit               C.make        D .explain

 8, The opposite of "polluted " is ....................

          A.fresh            B.good             C. dirty                 D.safe

9.He likes playing table tennis, ___________he can’t play it.

        A. and                            B. but                                      C. so                     D. or

10.___________eat too much candy. It’s not good for your health.

        A. Won’t                        B. Can’t                         C. Don’t               D. Mustn’t

11.We should go to school by bike to ________ energy.

        A. save                           B. protect                       C. pollute              D. make

12.We should use reusable water bottles ___________ of plastic ones.

        A. instead             B. because                      C. despite              D. however

13._________the air is cleaner; people will have less breathing problems.

      A. Unless      B. When                         C. If                      D. Because

 14. Many girls are women_________________aerobics to keep fit.

        A. play        B. do C. go D. make

15. If you have a map along, You ________ get lost.

A. will                            B. will not   C. wouldn’t          D. would

Bạn có vấn đề gì sao ??

change these sentences into negative and interrogative form.
1. (+) They listen to music every day.
(-) They don't listen to music every day.
(?) Do they listen to music every day?
2. She plays badminton every afternoon.
(-) She doesn't play badminton every afternoon.
(?) Does she play badminton every afternoon?
3. We love carving wood at weekend.
(-) We don't love carving wood at weekend.
(?) Do you love carving wood at weekend?
4. He does homework every night.
(-) He doesn't do homework every night.
(?) Does he do homework every night?
5. Mary and Peter go fishing after school.
(-) Mary and Peter don't go fishing after school.
(?) Do Mary and Peter go fishing after school?
6. He gets up 9.00 every morning.
(-) He doesn't get up at 9.00 every morning.
(?) Does he get up at 9.00 every morning?

1.      Yesterday Lan (not go )...........didn't go............. to school because she was sick.

2.      How often ……does…….your father (go).........go........ to work ? – six days a week.

3.      What ……will……you (do) ……do……tomorrow evening ? – I ( visit).............will visit......... Hoi An ancient town.

4.      They first (meet)...........met......... each other last week.

5.      Her brother (talk )............is talking............... to his pen pal on the phone at the moment .

1. How does he go to work?
2. Where does she work?
3. Who does your brother walk to school with?
4. How many knives does he have in the kitchen?

5. ballet

The sea is nice for swimming.

 \(aaa:a\)
\(=a\cdot111:a\)
\(=111\)

 \(abcabc:abc\)
\(=abc\cdot1001:abc\)
\(=1001\)

\(316-\left(5^2\cdot2^2+2^2\cdot9\right):2^3-3\cdot2^3\)
\(=316-\left(25\cdot4+4\cdot9\right):8-3\cdot8\)
\(=316-\left(100+36\right):8-24\)
\(=316-136:8-24\)
\(=316-17-24\)
\(=275\)