A. were B. am C. would be D. had been
A. where; when B. that; when C. that; that D. where, that
A. that B. if C. when D. what
A. understand B. understanding C. understood D. to understand
A. risen B. rising C. rise D. being raised
A. find out B. discovers C. will find D. will know
A. will have B. would be C. should be D. must be
A. for which B. with which C. against which D. about which
A. when B. where C. which D. why
A. what B. which C. why D. while