The more _________ we take the safety standards, the further we can speed up the development of the school bus industry.
| A．constantly | B．seriously |
| C．generally | D．immediately |
32．Miss Bell joined the search-and-rescue team when she was 14, the youngest age ______ one can be admitted．
| A．from which | B．at which | C．that | D．Which |
31．Laura was asked several questions, but she couldn't answer ______ of them．
| A．none | B．either | C．neither | D．Any |
30．1 tried to fix the car myself but ______ the attempt after a couple of hours．
| A．gave in | B．gave off | C．gave up | D．gave away |
29.On weekends when Dianna comes back home from school, she eats everything in ______．
| A．scene | B．sight | C．view | D．Range |
28．In most cases, customers can't help ______ to buy things they actually do not need．
| A．to persuade | B．to be persuaded | C．persuading | D．being persuaded |