—Good morning，Bill． —Did you have any trouble _____ through the snow？
| A．driving | B．to drive | C．drive | D．drove |
You said boys were cleverer than girls. That is _______ I disagree.
| A．what | B．where | C．which | D．why |
With the rapid growth of population, the city______ in all directions in the past five years.
| A．spreads | B．has spread | C．spread | D．had spread |
The question is ______can be put into practice.
| A．how you have learned | B．how what you have learned |
| C．that why you have learned | D．how that you have learned |
The announcement ______all flight were cancelled because of bad weather greatly distressed the waiting passengers.
| A．that | B．which | C．why | D．of which |
______surprises most of us.
| A．Wolves are afraid of us | B．The fact that wolves afraid men |
| C．The fact that wolves are afraid of men | D．Wolves’ afraid of men |