30. Even if you are an experienced teacher, you sometimes ____ make some mistakes.
| A．can | B．must | C．should | D．Will |
---Hi, Mike! We’re going biking along the beach this weekend.
---_______. I love being bathed in the sunshine.
| A．By all means | B．Count me in |
| C．Go ahead | D．With pleasure |
At the end of the holiday, traffic_______ on the freeway as people headed home.
| A．put up | B．picked up |
| C．took up | D．built up |
Two friends were talking about education, _______, about the kind of education that they received in their youth.
| A．or else | B．worse still |
| C．or rather | D．above all |
The temperature has risen to more than 20 degrees centigrade. It is quite hot _______January in Zhejiang.
| A．for | B．in | C．as | D．like |
--- Jack fell off the ladder yesterday, but he is all right now.
---What a lucky dog! He _______ himself badly.
| A．could injure | B．must have injured |
| C．should injure | D．might have injured |