When a pencil is partly in a glass of water, it looks as if __A breaks B has broken C were broken D had been broken我知道正确答案是C,但不知道为什么要用were,pencil 不是单数吗?

Is that a pencil s___? a pencil is under the is My ruler?—It‘s in the pencil box选一选,is My ruler?—It‘s in the pencil box选一选,A ,When B,Where C ,Why This is a pencil box.对a pencil box 提问 This is a pencil box.(对” a pencil box”提问 ) It is a pencil对pencil部分提问 when a pencil is partly in a glass of water,it looks as if it .是哪里的真题 when a pencil is partly in a glass of water,it looks as if it were broken 为什么用partly? is it a pencil?改为陈述句 this is a pencil 改为一般疑问句 that is a pencil.改为复数句 this is a pencil改为复数句 --- () is this?--It's a pencil Is () a pencil-case in the bag? is it a pencil?(肯定回答) there is a pencil-case and some is,too,that,pencil,my,and) (is,case,yellow,this,a,pencil(is,too,that,pencil,my,and) (is,case,yellow,this,a,pencil)连词成句 This pencil is 18cm.That pencil is 20cmThis pencil is a ___ ____ than that one