My cousin will never talk to anyone in a rude way people say something dirty to him.
| A．as if | B．even if | C．what if | D．only if |
Don’t respond to any e-mails ______ personal information, no matter how official they look．
| A．requested | B．request |
| C．requesting | D．to be requested |
—Hi, Albert, I can’t find my reference book!
—Sorry, I ______ it and I guess I put it on the top shelf with my things．
| A．use | B．had used |
| C．am using | D．used |
If you ______ an hour earlier, you wouldn’t have been caught in the rain．
| A．has returned | B．returned |
| C．had returned | D．will return |
I’d like to recommend some new computer programs _______ for home buildings．
| A．designing | B．designed |
| C．to design | D．design |
We haven’t discussed yet ______ we are going to place our new piano．
| A．where | B．which | C．what | D．that |