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

Henry will not be able to attend the meeting tonight because __.

The theory of continental drift assumes that there __ long-term climatic changes in many areas during the past.

Mom and dad just left for the airport twenty minutes ago, so they __ there yet.

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

Berta: “Can I have your report soon?” Jono: “Sure, I ______ it before you go to the meeting.”

Dina: Roni, that’s the most popular book nowadays. Roni: Oh yes, it must have been written by a distinguished professor __ that book.

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

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

Look at this street. It is very muddy. It __ have rained heavily last night.