保持水的化学性质的最小粒子是 ( )
If there's a lot of work ,I'd like to keep on until it is finished.( )
do
to do
done
doing
Hi,Mary.You look
Yeah,I'm going to America with my parents for a vacation.( )
kind
moved
excited
sad
How are you?
( )
Fine,thanks.
How do you do?
You're welcome.
See you later.
Excuse me, can I ask you some questions?
___________.( )
Sure, go ahead
Congratulations!
That's right
It doesn't matter
My mother _____ dinner when I got home yesterday.( )
has cooked
was cooking
will cook
cooks