The professor said he could talk on _____ interested the audience.

A. being not invited

B. not being invited

C. not inviting

D. not to be invited

A. which

B. what

C. where

D. /

A. had made

B. has been made

C. have made

D. has mad

A. accept

B. accepted

C. should accept

D. would accept

A. have

B. has

C. there is

D. there are

A. even if

B. since

C. whether

D. until

A. were

B. is

C. are

D. am

A. has

B. are being

C. is

D. are

A. that you talked

B. you talked about it

C. which you talked with

D. you talked about

A. that

B. which

C. whether

D. if