用括号里所给动词的适当形式填空。注意：每空不限一词。
The letter I’m looking forward to _______________ ( reach) me tomorrow.
Listen! How beautiful the song “You and me”         (sound)! Are you familiar with it?
These magazines must not ________________ (take) out of the reading room.
Zhang Wei sent me an e-mail the day before yesterday. He           (not reply) to mine for nearly 2 months.
Stop    ______ (complain) about the air pollution. Just think about what we can do to reduce it.