Choose the best answer

----- Nội dung dịch tự động từ ảnh -----
1. The secretary to_I talked didn't know where the meeting was.
B. who
C. that
2. There has not been much supply of water recently, ?
C. hasn't there
it is getting dark, we will not wait for him any longer.
C. Since
A. which
D. whom
A. does there
B. has there
D. has it
3.
A. Unless
B. While
D. Although
4. - "When_?" -"In 1928."
A. penicillin was discovered
C. was penicillin discovered
5. When it began to rain, the children_ in the yard.
A. played
B. penicillin discovered
D. did penicillin discover
B. were playing
C. have played
D. had played