----Anything special about this device?
----Well, it can ______ between the cancerous and the normal cells under certain conditions.
A. conclude B. exclude C. discriminate D. undergo
It is reported that China will not buy the Euro debt until some thorough research ______.
A. has been done B. will have been done
C. will be done D. had been done
Emotional conflict may shake the ______ of even the strongest relationship, e.g. between husband and wife, parents and children.
A. proportion B. foundation
C. innovation D. interaction
----You should have told her about the meaning of the gesture.
----I meant ______, but I had some unexpected guests.
A. to B. to have C. to do so D. doing so
----Hurry! There’s no time to waste.
----OK. But I’m afraid that ______ I work around the clock, I can’t catch up with those straight A students.
A. even if B. as C. until D. as though
Leonardo da Vinci ______ a scientist, if he had not been so skilled in other areas.
A. would be B. must be
C. might have been D. should have been
