1. Look at this street, it is very muddy, it ____ have rained heavily last night.

2. The child ate up all the meal we had served. He ____ very hungry.

3. Alfred visited some countries in Asia, Europe, and America. He bought luxurious things for his wife and children. He ____ a lot of money.

4. Berta: "Can I have your report soon?"
Jono: "Sure, I ____ it before you go to the meeting."

5.

Dina: "Roni, that is the most popular book nowadays.
Roni: Oh yes. It must have been written by a distinguished professor.

From the dialogue we know that indeed a distinguished professor ____ that book.

6. Mom and Dad just left for the airport twenty minutes ago, so they ____ there yet.

7. Although research scientists had hoped that the new drug interferon ____ to be a cure for cancer, its applications now appear to be more limited.

8. Henry will not abble to attend the meeting tonight because ____.

9. The theory of Continental Drift assumes that there ____ long-term climatic changes in many areas during the past.

10. The man standing over there asked me whether he ____ the flowers from my garden.