王英在荷塘边观看荷花,突然想测试池塘的水深,她把一株竖直的荷花(如右图)拉到岸边,花柄正好与水面成600夹角,测得AB长60cm,则荷花处水深OA为( )
-How do we turn on the oven?
-I you,weren't you listening?( )
tell
am telling
will tell
have told
There are no buses to the beach. you have a car,it's difficult to get there.( )
Since
After
Unless
Because
These beautiful animals are endangered.We must them.( )
save
show
stop
catch
Sue works ,so she never seems to make mistakes.( )
late
alone
happily
carefully
-What's the terrible noise?
-It's John.He the violin.( )
practiced
is practicing
was practicing
has practiced