The mascot(吉祥物) of Rio 2016Olympic Games is good luck( )
A.the number ofB.the symbol of
C.the color of
I went to your home yesterday morning, but you weren't in.
Well, I ______along the river at that time.( )
walked
was walking
am walking
have walked
To feed her little son. Mrs. Smith has to _______ the vegetables and meat.( )
make up
put up
set up
cut up
As far as I know, the robot that can sweep the floor ________ in the 1980s.( )
is invented
invented
was invented
has invented
The man _______ be a doctor in this hospital, but I'm not sure.( )
must
would
can
might
Ling ling, you'll feel sleepy tomorrow _______ you go to bed early.
OK, Mom. I'll go to bed at once.( )
if
unless
though
because