The boy is only four years old, but he can swim ______ the lake.
. ----______are they staying in Beijing? ----For three days.
.---It’s a fine day. Why don’t you go camping with us? ----________. Let’s go.
I often go to school ________.
----________ is it from your home to your school? ---- About 10 minutes’ walk.
Come here after class, I have ______ to tell you.