【热身练习】
用括号内所给词的适当形式填空。
1. Our trip was _(disappoint) because we did not find any unusual plants.2. The news was_ (shock). All the three boats had sunk in the storm and nobody survived.
I.指出下列各句中的V-ing形式在句中所充当的成分。
1. It's no use crying over spilt milk. 2. Do you know the man wearing a red shirt? 3. I am sorry to have kept you waiting long.