1.I've just seen David with a shovel in his hand. He.....in the garden right now.

a.may be working

b.must be working

c.should work

d.is working

2.Modern equipment.....long time ago, but better late than never.

a.should have import

b.might have been imported

c.must have been imported

d.should have been imported

3.Is the man you saw yesterday Bill's father? It.....Bill's father because he went to Europe two days ago.

a.can't have been

b.couldn't be

c.may not have been

d.must have been

1.Your motorcycle was stolen.You.....the police right after that.Why didn't you do that?

a.should call

b.could have called

c.may have called

d.must have called

2.There's nothing interesting on TV tonight.We.....out for a walk.

a.might as well go b.must go c.will go d.need go

3..........speak to me like that?

a.how dare you b.how do you dare c.how you dare d.why you dare to

4.Your wedding ring is very precious.You......lose it.

a.must

b.could

c.needn't

d.mustn't

bài 1:cho ab+bc+3ca=1.Tìm min S=\(a^2+b^2+c^2\)

Bài 1:Cho x ≥1.Tìm min P=3x+\(\dfrac{1}{2x}\)

Nguyễn Quốc Việt sai mất điểm

Diện tích tam giác là:

2,3 x 1,2 : 2 = 1,38 (dm²)

Đáp số: 1,38dm²

So sanh

A=\(\frac{3}{4}+\frac{8}{9}+\frac{15}{16}+.........+\frac{999}{1000}\)voi 98 va 99

1.b

1.Dave smoked a lot of cigarettes 2 years old.

->Dave used to.....

2.It's nearly twenty years since my father saw his brother.

->My father hasn't.....

3.Phong said "My parents are proud of my good marks"

->Phong said that.....

1.John said to me"I will make some experiments in this laboratory"

(Change into reported speech)

2.collapse/table/will/if/stand/you/it/on /The.

(Rearrange these words in correct order)

3.each other/We/ last/known/since/have/summer.

(Arrange the following words to make the complete sentence)

4.He usually (watch).....TV in his free time.

(Give the correct form of the verbs in bracket)

5.After I(finish).....my homework, I watched television.

(Give the correct form of the verbs in bracket)