trong các mạch điện gia đình người ta có thể lắp xen cầu chì cầu chì có tác dụng gì

givemthe correct tene of the verbs in brackets

1 Jacques Cousteau (invent)...........a deep- sea diving vessel in the nearly 1940s. It (help).............. him study the underwater

2 I (take)................part in race at shool lasr week, but I (not win).............any prizes because I (run) ........slowly

3 Soccer ( be)............. the most popular sport. millions of people (watch)..........and ( play).....it all round the world almost every day

4 I just(start)...............learning how to swim last mouth so I still (swim).........slowly

5 he is a safe cyclist . he never( cycle)........quickly

6 man ( begin).....to play sports long ago and now sports (be)...........still their favorite pastime activities

7 he( play)...............tennis badly before but now he (be)..a good tennis player

8 he ( have).....an accident in the swimming pool because he ( not listen)............to the pool lifeguards. now he (stay).........in the hospital

put the sentences into the correct order to male a dialogue

Tan: can we phat on sunday

minh: I'd love to, but Ican't

Tan: ok. see you on sunday morning

minh : I must help my dad repair the house

Tan: Would you like to phay rollerbladinh, Minh?

minh: yes, sunday is fine. I mustn't do anything on sunday

Tan; oh,no. why not

give the correct from of the words in btackets

1 my aunt is a talented artist. She draws picture...........(SKILL)

2 Baseball is...............for most teenagers in American. (INTEREST)

3 ............is the ost important for people on the road. therefore, a lot of programs on TV are made to rainse people's ..........of traffic (SAFE/ AWARE)

4 Walking is an easu and .........activity (EXPENSIVE)

5 Our walking club has nearly 15.............(PARTICIPATE)

We walk together every morning and sometimes at night

6 Can you speak more..........I can't follow what you say (SLOW)

7 Students must.............listen to the teachers in class to do exercises...........(CAREFUL/ GOOD)

8 Accidents can happen.........on the road. we sometimes can't stop them

9 Following traffic sings on streets is a .............way to avoid accidents ( SAFELY)

10 A.............. survey of teenagers in this country gave some..........result (RECENTLY/SURPRISE)

II Complete the paragraph with the correct tense of the verbs in brackets

When Tom (be)............young he used to play foolball and he (be)..............good at it, but then he(go) ...........away and ( work) ................in a town, and there (be)............no team for him there, so he ( stop) .............playing. Then he (begin)........to get fat, so he (think).........Now I (get0.......fatter and fatter. I know, I (play).............football again"

put in each gap one model verb from the box

can can't should should't must mustn't

1 i feel tired these days. i................sleep at night

2 children ..............obey their parents

3 "You............out late at night, Lan", her father said

4 .............he swim? Yes, he's a good swimmer

5 I'm going to learn to swim

-You............. learn with an adult and obey their orders

6 We...............stay up late at night because we may get tired the next day

cấu tạo và hoạt động hô hấp của ếch

có 4 vật a,b,c,d đều bị nhiễm điện. biết a hút b, b hút c, c hút d phân biệt các vật nhiễm điện theo nhóm nào ? vì sao?