David,look at the man in black over there.Can you tell me ____________?
He is an engineer.( )
A.who is heB.who he is
C.what he does
Elephants have good memories.They can walk for a long time and never .( )
get worried
get mad
get lost
In the evening,I either watch TV play computer games to relax myself.( )
or
and
nor
It is said that thirteen is unlucky number in many Western countries.( )
a
an
the
﹣I think wearing seat belts is very important for road safety. ﹣_____( )
That's all right.
I'm sorry.
That's a good idea.
I agree.
﹣_____﹣It's a pleasure.( )
Don't worry about the task.
Thank you for showing me around.
Be careful when you travel.
You' d better go to the dentist's now.