He failed the midterm examination and only then ________how much time he had wasted.
| A．he realized | B．did he realize |
| C．he had realized | D．had he realized |
This means going back to the place where we left the family ____ in a tree the night before.
| A．to sleep | B．to be sleeping | C．slept | D．sleeping |
Most birds find it __
__ to sleep in the trees.
| A．was safe | B．safe | C．to be safe | D．being safe |
The children talked so loudly at dinner table that I had to struggle ____.
| A．to be heard | B．to have heard | C．hearing | D．being heard |
Peter earns ____ his brother does.
| A．as much twice as | B．twice as much as |
| C．much as twice as | D．as twice much as |
Edward couldn’t remember when he first met Mr. Crook, but he was sure it was ____ Sunday because everybody was at ____ church.