D. Fill in the blank spaces with the correct form of Verbs!
1. My Mother was anxious because they ..... (come back) home very late. 2. There are a lot of students in the class. They ...... (wait for) you for 20 minutes. 3. I’ve written the letter but I ..... (not, post) it yet. 4. A: What time is Mark leaving? B: He’s ...... (already, go) 5. ...... you (ever, ride) a horse?
1. Came back
2. Are waiting for
3. Haven't post
4. B: Already went
5. Have you ever rode