A. student, is B. the students, are C. the students, is D. students, are
A. is standing B. standing C. stands D. stand
A. have been B. have gone C. has been D. has gone
A. know B. knows C. Knew D. known
A. are B. is C. will be D. would be
A. is B. are C. has D. have
A. are feeding B. feed C. is fed D. is feeding
A. go B. went C. has gone D. have gone
A. have B. has C. is D. are
A. had made B. has been made C. have made D. has made