用所给单词的适当形式填空。 1. Would you like to _____________ (plant) trees? 2. She can _____________ (swim) in the river. 3. Let me _____________ (have) a look. 4. Mary _____________ (read) a book now. 5. Let's _____________ (invite) your parents to the party. 6. She has twelve _____________ (knife). 7. I like collecting _____________ (leaf). 8. Last year Mr. Black _____________ (study) Chinese.