Peter is than Sam.
A. funny B. funnier C. most funny
答案:B
than后加比较对象,前面用形容词比较级,故选B。
已知等比数列{an},且a4+a8=-2,则a6(a2+2a6+a10)的值为( )
A.6
B.4
C.8
D.-9
Do you have two ________. [ ]
A. pencil case
B. pencils case
C. pencil cases
D. pencils cases