great efforts to practice English, Mary has made much progress inspoken English.

The buildings in this modern city are growing tall, some even reaching over 400 meters _______ height

If you watch carefully, you can see ________ the man does the trick with the cards.

When can I come for the computer I needit next Tuesday. — It ________ be repaired by next Mondayafternoon.

Nowadays，scientistsare working hard to find a best way of treating addictions ________ drugs.