Greenland, ＿＿＿＿＿island in the world, covers even two million square kilometers.
| A．it is the largest | B．that is the largest | C．is the largest | D．the largest |
Only after a baby seal is pushed into the sea by its mother ___ to swim.
| A．how will it learn | B．it will learn how |
| C．will it learn how | D．and it will learn how |
"Will you be able to finish the job this week?" " ___ ."
| A．I can't say it | B．I don't know that |
| C．I'm not sure this | D．I don't expect so |
She was just about to explain ___ she hadn't passed her maths test chiefly out of carelessness ___ her uncle came.
| A．her mother … when | B．to her mother why … that |
| C．her mother that … when | D．to her mother that … when |
The newspaper's owner and editor ___ away on holiday.
| A．is | B．are | C．be | D．have been |
____ the expense, I ____ a round-the-world tour.
| A．Were it not … would take | B．If it were not… take |
| C．Weren't it for… will take | D．If it hadn't been for… would have taken |