句型转换。

1.  If it is possible,you can tum to him for help.

   ___________ __________,you can tum to him for help.

2. If they were here now,they could help us.

  _________ ____________ _____________ now,they could help us.

3. Because he was ill,he didn't attend the meeting.

  ________ __________,he didn't attend the meeting.

4. That is the naughty boy. We talked about him last week.

    That is the naughty boy _______ __________ __________ last week.

5. The exhibition is more interesting than it was expected.

    The exhibition is more interesting __________ ____________ .