Trộn 200 ml Ba ( OH ) 2  0,01M với 200 ml KOH 0,03M thu được dung dịch X. Giá trị pH của dung dịch X là

A. 9

B. 10

C. 12,4

D. 13,2

The boy about whom you were angry is my son.

A. The

B. about

C. were

D. is

Choose one option A, B, C or D corresponding to the sentence which has the same meaning as the original one

“Could you please wait here until your name is called?” she said.

A. She wanted to know if I could wait there until my name was called.

B. She asked me to wait there until my name was called.

C. She advised me to wait there until my name was called.

D. She reminded me to wait here until my name was called.