We tried to _______ his doubts and let him tell the truth.
Would you mind telling me _______ language your friend speaks?
When I try to understand ________ that prevents children from getting fat, it seems to me that there are two reasons.
China’s success in manned-spacecraft travel shows ________ our country has become one of the greatest powers in space research.
It was a matter of ________ would take the position.
—Do you remember ________ he came?—Yes, I do. He came by car.