Did you return Fred’s call?—I didn’t need to ____ I’ll see him tomorrow

It was not until the 1960s and 1970s archaeologists made real progress in understanding the script.

Scientists observe ___ making the most of our senses when we are young can keep us healthy later on in life.

There are so many books. Would you please ask some students _______ me ______ them to the classroom — Ok.

No one will be sad because humans will have learnt to fix many of the problems that affect us now, like war, pollution and hunger, ________ ?