He hasn’t got any hobbies，_______ you call watching TV a hobby.
| A．when | B．if | C．unless | D．since |
Strangely, some people find that they can smell one type of flower but not another, while others are _____ to the smells of both flowers.
| A．sensitive | B．native |
| C．familiar | D．obvious |
The teeth are _____ , and my grandmother often takes them out to wash them and then put them back.
| A．magical | B．artificial |
| C．logical | D．official |
The government had to _____ private houses to make room for new blocks of apartments.
| A．blow up | B．break up |
| C．watch over | D．stand for |
The policeman always _____ his post and struggled against the difficulties to protect the safety of the people and their property.
| A．belonged to | B．turned to |
| C．stuck to | D．appealed to |
. Tim, better have a good rest now; you do need to _____ your energy for the football match this afternoon.
| A．shelter | B．remove |
| C．explode | D．reserve |