The plane got back to the airport and landed＿＿＿＿at last

It is surprising that Jack, who is only 39 years old, _______ in the field of engineering for 20 years when he entered the company last month

The Olympic Games of 2016 will____ in Brazil.

Daniel，why are you so late? We _______ you would be here an hour ago— SorryI ________ know you were all here

art is believed to be a capableperson, who is equal_____ charge of the company very well.