The government should protect the old valuable buildings_______ they are not in harmony with the modern ones nearby.
| A．even though | B．as if | C．so that | D．now that |
In many ways, riding on a bike is simliar to ___.
| A．driving a car | B．when you drive a car | C．drive a car | D．when driving a car |
We did the job as fast as we could, ___ to finish it earlier.
| A．hoping | B．to hope | C．hoped | D．being hoped |
We had better not __ them busy all day long.
| A．to keep | B．keeping | C．kept | D．keep |
The girl is dangerous ___.
| A．to make friends | B．make friends with | C．to make friend with | D．to make friends with |
---Why was Mary so upset? ---She isn't used ___ criticized.
| A．be | B．to be | C．to being | D．being |