He has no idea what the book is about．He have read it very carefully．
| A．needn’t | B．shouldn’t | C．can’t | D．mustn’t |
33．The Day of the Dead, an ancient Mexican festival, is not a sad day, but _________time to celebrate__________cycle of life.
| A．a, the | B．不填, the | C．不填,a | D．the, a |
32．How_________I help them to understand when they won’t listen to me?
| A．can | B．would | C．may | D．Must |
31．In summer, food will go bad if_________in room temperature.
| A．leaving | B．left | C．being left | D．having left |
30．QQ,______you can chat with your friends, makes communication easy.
| A．why | B．which | C．that | D．Where |
29．Someone________his car in front of my house and it is blocking my driveway.
| A．has parked | B．is parking | C．parked | D．had parked |