cho hình thang ABCD có độ dài đáy lớn AB bằng 2 lần đáy nhỏ CD gọi I là trung điểm AB. Đường thẳng AD cắt BC tại E . 

a) chứng minh AICD và BCDI là hình bình hành

b) chứng minh AD = DE

cho truoc x+5 se la bao nhieu trong cau lenh nay:  if (x mod 3=2)  then x:=x+5

1. Last year wasn't as cold as this year

- this year is.............last year was

2. How much is it to go skiing ?

- what ........................ to go skiing ?

3. Do you know ............................. these skis are ?

4. James can skin well

james is .................................................... skiing

5. driving is heavy snow isn't easy

- Heaving snow makes it ..................... driver

2 judy is as old as Helen

-Judy ...................... Helen

3 I would strongly advise you apologise for your mistake (better)

- You ....................... your mistake

4 Take a coat because it might get colder in the evening ( case)

- Take a coat .................. colder in the evening

5 They had to postpone the match until Friday ( off )

- The Match ............................until Friday