The twins look the same, but they are really different.
| A．at a time | B．from time to time |
| C．by the way | D．in some ways |
I think I have ________ my homework at home.
| A．forget | B．left | C．forgotten | D．leave |
_________ September 21, 2011, I arrived at my school at around 7:50 a.m.
| A．In | B．On | C．By | D．At |
By the time I got up, my mother _______ .
| A．left | B．had left | C．has left | D．is leaving |
Life is full ______ unexpected.
| A．with | B．of | C．on | D．about |
选择与画线部分意思相同或相近的单词。
I don’t think you can finish the work by yourself．
| A．lonely | B．alone | C．easily | D．own |