Ⅰ.单句语法填空
1．Five ambulances are on standby at the port.
2．Representatives(representative)from about 50 countries will be trained by the end of the year.
3．Richard was waiting outside the door as she emerged(emerge).
4．The rice mill was wrecked by the enemy bombing(bomb).
5．I don't think his remarks are relevant to our discussion.
6．We should not only be bold，but also be cautious.
7．He could face a charge of illegally importing different weapons(weapon).
8．In sum，2021 will be a crucial year for health reform.
9．Grains(grain)must be aired in the sun before they can be stored.
