Although he knew little about the large amount of work done in the field , he succeeded ____other more well-informed experimenters failed.
| A．as | B．unless | C．what | D．where |
----- _______ in the workshop. Please stop it.
----- Sorry. I________.
| A．Smoking is not allowed, don’t know | B．Not smoking, an not sure |
| C．Don’t smoke, have no idea | D．Smoking is forbidden, didn’t know |
----- What happened in that new area?
----- New houses ______ recently over there.
| A．are built | B．build |
| C．have built | D．have been built |
What _____ their child fond of?
| A．do | B．does | C．are | D．is |
I don’t think Mary and Sue _____ before, ______?
| A．have met; haven’t they | B．have met; have they |
| C．have seen; do I | D．have seen; don’t they |
The visiting professor _____ giving lectures to students ______ invited to meetings at times.
| A．preferred; to being | B．preferred to; rather than |
| C．preferred; than being | D．preferred; to being |