D

1.     How does she often (go).........go..........to school?~ She(go).....goes.....................to school by bike.

2.     Lan (ride)..........is ridding.........her bike now.

3.     They (travel)..........are traveling ...........by train at the moment.

4.     Hoa’s brother (be).....is...........an engineer, but he (not work).............isn't working...........at the moment.

5.     Lan and Phuong (be)............are.......in the kitchen. They (cook)................are cooking........now.

6.     Nam usually (play)................plays.........sports, but sometimes he (fly)............flies......his kites.

7.     My mother (cook) …is cooking…… in the kitchen now.

8.     He (go) .........................Goes.............to school with me every day.

9.     What are Tom (do) ...............doing.............now ?~ He (watch) ...................is watching................... TV?

10.  We (visit) ..will visit............Ha Long Bay this summer.   

11.  She (travel)......travels......... to school by bike everyday.      

12.  What  Do you (visit)……visit… this summer vacation? ~  I (visit) ............visit......... Da Lat.

13.  They (do) .........................Are doing.................their homework now.     

14.  What does she (do)……………….do………… in the spring? ~ She always (go)……………goes…… camping.

15.  Ba and Lan sometimes (go) go...............to the zoo.    

16.  We (have )will have.................. an English test next week.

a. K+O₂- - ->K₂O

b. 2Ca +O₂- - t^o-> 2CaO

c.Na+H₂O-t^o - -> Na(OH)₂+H₂

d. Ba + H2O- - -> NaNO3 => sai dề

phải là: Ba + H₂O--t^o---> Ba(OH)₂+H₂

e. N₂O₅+Na₂O- -t^o -> 2NaNO₃

1.     Ho Chi Minh city is .............. than Hanoi.  A. big           B. bigger         C. biggest      D. biger

2.     Children often learn very .................... things around them.

            A. quickly                   B. quicker                   C. quickest                              D. quick

3.     There is nothing ............ than going swimming in hot weather.

            A. gooder                    B. good                       C. better                                  D. best

4.     .Nam is bad at art but Minh is even ..........................A. badder     B. bad          C. worse                 D. worser

5.     The country is .............. than  the city.   A. quieter          B . more quiet      C. more quietly           D. quietlier

6.      Mexico City is ……………………………..city in the world.

            A. biger                       B. big                          C. bigger                                 D. the biggest

Summer is……the…hottest…..………..season of the year (hot)

It is ……colder…..today than it was yesterday (cold)

Our hotel was …………cheaper..…..than all the others in the town (cheap)

What’s ……the longest…..……..river in the world (long)

Nga and Lan are ………………shorter……….. than Minh.  (short)

My mother is ………younger ……………… than my father.     (young)               

Ha Noi is …smaller….than Ho Chi Minh city. (small)

This boy is ……………taller……..than that boy. (tall)    

A dictionary is …………………thicker  than a notebook. (thick)                    

Buildings are ………higher……….……….. than houses. (high)       

Lan is the …………happiest…………. student in my class. (happy)

Our parents are the …best……….. people. (good)

The winter is the ……coldest……. season in a year. (cold

1/ My dog is sick, I will take him to see a doctor tomorrow.

My dog is sick , He …will be taken to see a doctor tomorrow ………………………………… .

2/ I will borrow this book from Tom.

This book  will be borrowed from Tom

…………………………………………..

3/ I will be sell this old computer for purchasing news telephone

This old computer  will be sold for purchasing news telephone

……………………………

4/ Hung will introduce his girlfriend on his next birthday

His girlfriend will be introduced by Hung on his next birthday ………………………………………………………

5/ I will hang the clothes in my house

The clothes will be hung in my house

C

1 although the condition of the house had been bad,....

2 In spite of the bad weather,...

3 because of the bad condition of the house,...

4 in spite of he was sick,......

5 because of the large crowds,....