In today’s fast changing and competitive world, to be able to learn faster and more effectively is not merely desirable; it is ________.
| A．essential | B．worthwhile | C．challenging | D．sufficient |
— How about your weekend?
— Very boring. We could do nothing but ______ for the sky to clear up.
| A．wait | B．waiting | C．to wait | D．to be waiting |
These MP4s are more advanced, but they are ________ the previous ones in price.
| A．opposite to | B．equal to | C．close to | D．next to |
She was about to go to bed when it suddenly _____ to her that she hadn’t turned off the gas.
| A．happened | B．occurred | C．explained | D．referred |
In this country it is ordered that anyone who______ recently come here ________to pass this kind of test .
| A．has; has | B．has ; had | C．has ; have | D．have; have |
____ not only he but also his friends been to New York?
| A．Does | B．Do | C．Has | D．Have |