I. Choose the words whose underlined part is pronounced differently from that of the others in each group.

1. A. sleeping                          B. island                                  C. campsite                             D. staying

2. A. nearby                            B. battery                                C. pretty                                  D. thirty

3. A. close                               B. canyon                                C. climbing                             D. cell phone

4. A. tent                                 B. jacket                                  C. best                                     D. get

5. A. rafting                            B. camping                              C. plane                                  D. kayaking

6. A. beach                              B. seafood                              C. beautiful                             D. weather

7. A. wonders                         B. comic books                       C. forests                                D. trips

8. A. pillows                            B. towels                                 C. flashlights                           D. toys

9. A. sunglasses                       B. candies                               C. sandcastles                         D. caves

10. A. confirmed                     B. traveled                              C. stayed                                 D. hiked

II. Choose the word whose main stressed syllable is placed differently from that of the other in each group.

1. A. pillow                             B. towel                                  C. forest                                  D. confirm

2. A. weekend                         B. campsite                             C. flashlight                            D. highland

3. A. waterfall                         B. vacation                              C. kayaking                             D. canyon

4. A. dangerous                       B. natural                                C. beautiful                             D. delicious

5. A. Caribbean                       B. international                       C. geography                          D. Indonesian

I. Choose the words whose underlined part is pronounced differently from that of the others in each group.

1. A. sea                                  B. screen                                 C. smart                                  D. sugar

2. A. eco-friendly                    B. sky                                      C. gravity                                D. megacity

3. A. Earth                              B. earthscraper                        C. themselves                         D. things

4. A. helper                             B. device                                 C. describe                              D. deliver

5. A. printer                             B. machine                              C. automatic                           D. furniture

6. A. ready                              B. healthy                               C. already                               D. means

7. A. sleeping bags                  B. astronauts                           C. homes                                 D. schools

8. A. breaks                             B. showers                              C. ideas                                   D. jobs

9. A. stores                              B. groceries                             C. fridges                                D. drones

10. A. discussed                      B. helped                                 C. looked                                D. printed

II. Choose the word whose main stressed syllable is placed differently from that of the other in each group.

1. A. printer                             B. device                                 C. robot                                   D. spacesuit

2. A. future                             B. helper                                  C. housework                          D. machine

3. A. underground                  B. astronaut                             C. gravity                                D. company

4. A. furniture                         B. cameras                               C. advantage                           D. different

5. A. megacity                         B. indefinite                            C. delivery                              D. technology

s2 = 64 + 24 = 88m

Bạn ơi chưa cộng chỗ S2 kìa

Ta có: \(s=v_0t+\dfrac{1}{2}at^2\)

Theo đề bài, ta có hệ phương trình: \(\left\{{}\begin{matrix}24=4v_0+8a\\64+24=4\cdot2v_0+8\cdot4a\Leftrightarrow88=8v_0+32a\end{matrix}\right.\)

Giải hệ phương trình, ta được: \(\left\{{}\begin{matrix}v_0=1\left(\dfrac{m}{s}\right)\\a=2,5\left(\dfrac{m}{s^2}\right)\end{matrix}\right.\)