Question

1、The maths problem is too difficult for us to ( ). A、work it out Bwork out 2、I didn’t know

___ in Guangzhou.How long ______ here? A.were, have been B.were,have come 急，说明理由

Answer 1

1、B
too…to…结构是简单句中的一种结构。所以不需加it，加it之后就是一句句子拉~
此句还有一种表达是：The
maths
problem
is
so
difficult
that
we
can't
work
it
out.
2、A
come是短暂性动词，不能与how
long提问的短语连用
have
been
in
指在某地呆了一段时间，后接for+一段时间或其他表示一段时间的短语。