____ orange is ____ orange.[ ]
A. An; /
B. /; an
C. An; an
D. /; /
答案:A
Holiday shopping ___be a tiring experience.There are so many places to visit and choices to make.
A.can
B.may
C.shall
D.will
玉米螟幼虫共()。
A.4龄
B.5龄
C.6龄