_______naturally by the skin when exposed to sunlight, Vitamin D is needed for healthy bones, teeth and muscles.
A. Making B. To make
C. Made D. Make
—How was your vacation in Seattle?
—Pretty good. In the evenings I __________ to pubs to enjoy beer.
A. have gone B. go
C. had gone D. went
________some people criticize graffiti for being ugly and destructive, those graffiti lovers still see it as real art.
A. As B. While
C. Once D. Until
He messed the project up, but he behaved as if nothing __________.
A. had happened B. happened
C. would happen D. would have happened
When I was small, my mom ________read me stories at night.
A. could B. should
C. might D. would
Dream of the Red Chamber is believed to be semi-autobiographical, _______the fortunes of Cao’s own family.
A. mirrored B. to mirror
C. mirroring D. mirror
