It was not easy for him to buy good shoes because he had such a big _____ of feet.
| A．couple | B．size | C．number | D．pair |
There is an increase of 16% in the consumption of tobacco_____ the previous year.
| A．over | B．than | C．to | D．then |
They are going to have the serviceman ____ an electric fan in the office tomorrow.
| A．install | B．to install | C．to be installed | D．installed |
When he arrived, he found ____ the aged and the sick at home.
| A．nothing but | B．none but | C．none other than | D．no other than |
You cannot be ____ careful when you drive a car.
| A．very | B．so | C．too | D．enough |
Time should be made a good use ____ our lessons well.
| A．of to learn | B．of learning | C．to learn | D．to learning |