6.I heard ( )the ”Internet Plus”policy has been launched.

7.The pipes should()plastic.

6.We wanted to ask why users would()this product.

5.Our system can()different application programs.

4.She has()in business as a hairdresser.

3.Sometimes， a reply could()a debate.

2.We()ourselves()providing integrated logistics(物流)services for our clients.

1.Many young students decide to have a gap year before they()college.

5.Safety should always be the top priorit ()(where) we are.

4.He retained a ()(child) sense of wonder.

3. () (what) you do， don’ t upset the kids.