_____ three influenza type A virus subtypes(子类型) have been found in pigs.
A.By far | B.As far as | C.So far | D.Till far |
Some people like drinking coffee,for it has___effects
A.promoting |
B.stimulating |
C.enhancing |
D.encouraging |
The law___the sale of cigarettes to people under the age of 16
A.encourages |
B.allows |
C.forbids |
D.helps |
I forbid___here.Who has permitted you___here?
A.smoke;smoking |
B.smoking;to smoke |
C.smoking;smoking |
D.to smoke;smoking |
I haven’t read___of his books,but judging from the one I have read,I think he’ll make a very promising writer
A.any |
B.none |
C.both |
D.either |
The great trouble he___show us how to run the machine___him completely tired out
A.took to;made |
B.takes to;make |
C.took;make |
D.takes to;to make |