Without his wartime experiences, Hemingway____ his famous novel A Farewell to Arms.
| A．Didn’t write | B．hadn’t written |
| C．wouldn’t write | D．wouldn’t have written |
Last year was the warmest year on record, with global temperature 0.68 ℃____ the average.
| A．below | B．on | C．at | D．above |
Like ancient sailors, birds can find their way____ the sun and the stars.
| A．used | B．having used | C．using | D．use |
______ he once felt like giving up, he now has the determination to push further and keep on going.
| A．Where | B．As | C．In case | D．Now that |
He wrote many children’ s books, nearly half of____ were published in the 1990s.
| A．whom | B．which | C．them | D．That |