—What did you do yesterday?—My brother took two friends of ________ to play chess with us. But I don't know _______ of them.
A：his, all
B：him, both
C：him, either
D：his, either
有甲、乙、丙、丁、戊5只猫，其中甲、乙、丙都是短毛猫，丁和戊是长毛猫，甲、乙为雌猫，其余是雄猫。甲和戊的后代全是短毛猫，乙和丁的后代长毛猫和短毛猫均有。欲测定丙猫的基因型，最好选择（ ）
Nicotine is a drug(药) that gets one into the __________ of smoking.
Where ________ my pencil?（ ）
