A. is it B. isn't it C. is there D. isn't there
A. has B. are C. is D. have
A. is B. are C. were D. will be
A. is used to be B. used to be C. used to have D. was used to be
A. is B. are C. have D. be
A. has B. have C. is D. are
A. is B. are C. has D. were
A. there will have B. there will be C. there has D. there has been
A. is; knocking B. is; knock C. are; knocking D. are; knock
A. is, standing B. are, are standing C. are, standing D. is, is standing