A. by B. at C. without D. for
A. from;in B. of;in C. from;on D. of;on
A. for B. to C. of D. with
A. as a result B. because C. so D. because of
A. to B. in C. at D. for
A. Both;and B. Either;or C. Neither;nor D. Not;but
A. before B. until C. though D. unless
A. and B. but C. or D. so
A. until B. before C. while D. since
A. if B. after C. unless D. while