1. I've never done any harder task before. 

2. In case there's an emergency, ring this number.

3. It will be impossible for them to come on SUnday,

4. I have trouble in remembering people's names.

5. It takes more than an hour for the boy to repair his bike.

Bài IX phải ko bạn ???

IX)

1  . I have never done any harder task than this task before

2 . In case , there's an emergency , ring this number

3 . It will be impossible for them to come on Sunday

4 . I have difficulty in  remembering people's names

5 . It takes  more than an hour for the boy to repair his bike

#No_copy

#Kun