下列物质中,前一种物质是氧化物,后一种物质是混合物的是
He ____ be in the restaurant.His car is just outside it!( )
can
can't
must
mustn't
What do you want to be in the future,Nick?
I want to be__________ pilot.It is________ exciting job.( )
a;a
a;an
the;an
a;the
There are so many foggy days recently.We all wonder_________.( )
A.how is the air polluted
B.why the air is seriously polluted
C.what can we do to prevent that bad weather
D.what are the real reasons
Don't worry! I'm sure you'll your classmates if you are kind and friendly to them.( )
A.catch up withB.agree with
C.have a word withD.get along well with
The car looks nice,______It's much greener because it uses electricity.( )
However
What's worse
Even though
Besides