单句填空。 1. _________ ( know ) basic first-aid techniques will help you respond quickly to emergencies. 2. Anyone, once _________ (test) positive for H7N9 flu virus, will receive free medical treatment from our government. 3. _______________ (found) in the early 20th century, the school keeps on inspiring children’s love of art. 4. I got to the office earlier that day, ________ ( catch) the 7:30 train from Paddington 5. ----They might just have a place _________ ( leave ) on the writing course. -----why don't you give it a try? 6. The sunlight is white and blinding, (throw) hard-edged shadows on the ground. 7. Volunteering gives you a chance ____________ (change) lives, including your own . 8. (find) the course very difficult, she decided to move to a lower level . 9. When we saw the road (block) with snow, we decided to spend the holiday at home . 10. You cannot accept an opinion _____________ (offer) to you unless it is based on facts.