______ ever find something you want to save on your own computer, you can download it.
| A．Should you | B．If should you |
| C．If you will | D．Will you |
A good friend of mine from when I was born _______ at my home right before I left for Beijing．
| A．showing up | B．showed up | C．to show up | D．shows up |
．The factory I worked______ has been taken down and replaced by some buildings．
| A．in it | B．in which | C．in | D．in that |
Hurriedly, they packed their belonging and set off ______the direction of the river．
| A．for | B．to | C．at | D．in |
It’s hard for me to ______ him dancing the stomach dance in public!
| A．think | B．consider | C．imagine | D．treat |
He seemed______ to me at the party last month, but I can’t remember well now ．
| A．to introduce | B．to have introduced |
| C．to be introduced | D．to have been introduced |