Bài 2

a) giá trị tuyệt đối x > 7

b)gia tri tuyet doi x < 4/5

c) gia tri tuyet doi x + 2 ≥ 7

đ) giá trị tuyệt đối x - 1 ≤ 3

x ϵ z

Bài 2 tìm x ϵ z

a)-4/3/5 . 2 /4 /23 ≤ x ≤ -2/2/5 : 1/6/15

b)-4/1/3 . ( 1/2 - 1/6) ≤ x ≤ -2/3 . ( 1/3 . 1/2 .3/4)

BÀI 1 .REWRITE THESE SENTENCES BY USING CONDITIONAL SENTENCE TYPE 1 (câu điều kiện loại 1)

1.Stay here and you will feel save .

If ....................................................

2.Pay electricity bill today or your electricity will be cut off .

If..............................................................................................

3.Stop smoking other wise your cough may be worse.

If.................................................................................

4.Unless we use less fossil fuel , they will be run out soon .

If...........................................................................................

5.Unless it stops raining today , we may be faced with a serious flood .

If.............................................................................................................

6.Do morning exercises regularly and your body will be fitter.

If..................................................................................................

7.Unless we renewable energy , we will have notthing for the future generation.

If.............................................................................................................................

8.The climate will change unless we reduce the use of non - renewable energy

If............................................................................................................................

9.Lock all the doors and noone can break into your house.

If.........................................................................................

10.Unless we continue hunting polar bears , they will become extinct in near future.

If.............................................................................................................................

I.....(loose) my watch in the park - thi qua khu don

IV. write the sentences using PAST SIMPLE

1.Last year I ( not / spend ) .........my holiday in Ireland

2.It ( not / rain ) .........a lot

3. But we ( not / see ) ....... some beautiful rainbows

4.We .........(sell) our old car

I (not/travel)..........around by car with two friends and we (not/visit)..........lots of interesting places - chia theo thì quá khứ đơn