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 __________ ____________ .