In order to find the missing boy, the young couple all they can over the past twenty-four hours.
| A．do | B．did | C．have been doing | D．had done |
— I’ll come to attend your lecture at 10p.m. tomorrow.
— I’m sorry, by then the lecture will have ended and I _____ my guests in my office.
| A．will meet | B．am about to meet |
| C．am to meet | D．will be meeting |
Whenever I arrive home from study, I will first ______ my favorite DVD and then do my homework.
| A．turn on | B．lay down | C．open up | D．put on |
── Do you know our town?
── No, this is the first time I ________ here.
| A．was | B．have been |
| C．came | D．am coming |
I have many friends,some re teachers.
| A．of them | B．from which | C．who of | D．of whom |
The plane ________ when I arrived at the airport．
| A．have gone | B．went |
| C．is going | D．had gone |