There are a pencil and two pens on the desk.
问题描述：
There are a pencil and two pens on the desk.
这句话哪里错了?
There是A,are是B，two pans是C，on the dask是D，ABCD哪个错了？你们都不对
答
are 改成is
就是选B
There are a pencil 看这个前半句,一个pencil为什么要用are?
如果用are,句子就改成这样．
There are two pens and a pencil on the desk
注意这个句子的前半部分：There are two pens