题目

从方框中选择合适的词填空。think，it，an，on，in，of，It's，Where，know，What Look at the picture. It's a picture a room.can you seethe room？I can see an orangethe desk. Can you see English book on the desk？No，I can't. Is the bag behind(在……后面) the chair？Yes，is. is the pen？I it's in the pencil case. Where is the cat？under the desk. What's its name？Sorry，I don't .3名男生、3名女生站成一排：（1）女生都不站在两端，有多少不同的站法？（2）三名男生要相邻，有多少种不同的站法？（3）三名女生互不相邻，三名男生也互不相邻，有多少种不同的站法？（4）女生甲，女生乙都不与男生丙相邻，有多少种不同的站法？