It ________be the vocabulary that caused you the problem in the exercise because you know a lot of words. (2013·安徽，34)
| A．may | B．couldn’t |
| C．should | D．needn’t |
Just in front of our house ______ with a history of 1000 years.
| A．does a tall tree stand | B．stands a tall tree |
| C．a tall tree is standing | D．a tall tree stands |
The children were left _____ of a neighbor when they went on holiday.
| A．in the charge | B．in charge | C．under charge | D．at charge |
----How beautiful the university is, Professor Wu.
----So it is. I ______ here for four years and my daughter is studying here too.
A. studied B. have studied C. was studied D. had studied
Welcome to our online mall! If you buy ______iphone4 here, you can get a watch for _____free.
| A．a; / | B．an; the | C．an; / | D．the; the |
—_______ for Beijing?
—Yes, and I’ll come back in two months.
| A．Have you left | B．Are you leaving | C．Do you leave | D．Did you leave |