----If the traffic hadn’t been so heavy, I could have been back by 6 o’clock.----What a pity! Tina _________ here to see you
Nowadays, scientists are working hard to find a best way of treating addictions __________ drugs.
My doctor recommended that I _______ more exercise.
As a teacher you should _________ your method to ______ the needs of slower students.
----The boss said we had only three days to finish the task. ----No problem. We have already _________ two thirds of it.
The invention of spaceships makes ________ human beings to travel to the moon.