2. It is necessary that I post this letter tonight (need)

=> I need to post this letter tonight.

3.You'll be ill if you continue to smoke (stop)

=> Unless you stop smoking, you'll be ill.

4. You'd better not touch that switch (wouldn't)

=> If I were you, I wouldn't touch that switch.

5. The patient recovered more rapidly then expected (recovery)

=> The patient made more rapid recovery than expected.

31.can you use this laptop?

-you can________use this laptop, can't you?__________.

32.he can't remember the answer to these questions.

-he wish_________he could remember the answer to these questions.__________.

33."I must go to Da Lat tomorrow afternoon."SAID Nhung.

-Nhung said________that she must go to Da Lat the next day afternoon.________.

34.Minh spends 2 hours a day studying in a group with his  friends.

-it takes________Minh 2 hours a day to study in a group with his friends.____________.

35.they take their umbrellas because it is raining heavily.

-it is____________raining heavily, so they take their umbrellas._____________.

Ta có:  \(\sqrt{9-4\sqrt{5}}-\sqrt{5}\)

\(=\sqrt{5-4\sqrt{5}+4}-\sqrt{5}\)

\(=\sqrt{\left(\sqrt{5}-2\right)^2}-\sqrt{5}\)

\(=|\sqrt{5}-2|-\sqrt{5}\)

\(=\sqrt{5}-2-\sqrt{5}\)

\(=-2\)= VP

=> đpcm

=.= hok tốt!!

\(VT=\sqrt{9-4\sqrt{5}}-\sqrt{5}\)

\(=\sqrt{4-4\sqrt{5}+5}-\sqrt{5}\)

\(=\sqrt{\left(2-\sqrt{5}\right)^2}-\sqrt{5}\)

\(=\left|2-\sqrt{5}\right|-\sqrt{5}\)

\(=\sqrt{5}-2-\sqrt{5}\)

\(=-2\)

\(=VP\)

Vậy đẳng thức được chứng minh

số  lượng người tham gia gia hội vượt quá mong đợi của chúng tôi

Số lượng người tham gia hội quá đông vượt mong đọi của tôi

giải thích: Vì hai giới từ không thể đứng liền nhau.(nếu chọn C thì trong câu này có hai giới từ là with và about đứng gần kề nhau)

@khongcanten: câu D cũng có giới từ là out mà

1. to

2.in

3.out of

4.for

5.of

6. in

7.in

8.on

9.of

5.of

3.out of

Chúc bạn học tốt

#kbn 

A.R.M.Y

ARMY

kb nha

I hope that i will take a boat trip to MeKong river before i come back Japan in July

1. There are  some people in the dining room. 

2. Would you   some apple juice? 

3. She doesn’t know why there aren’t  any students in the canteen today. 

4. Have you got  any bread? 

5. Can I have  some bread, please?

hết

1 : some

2 : some

3 : any

4 : any

5 : some