This kind of cancer can be cured, provided it is ______ early.
| A．got | B．gained |
| C．seen | D．caught |
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 |
She has owned the painting since 1950, when it ______ to her as a wedding present．
| A．has given | B．gave |
| C．was given | D．has been given |
You can get to your destination earlier ______ you don’t mind taking the night train．
| A．when | B．if | C．though | D．until |