― It’ a fine day. Shall we go jogging ― ______ But we need to be home before six.

Dad, may I go out with my friends — Unless your homework .

On rainy days, accidents ______ happen sometimes on steep roads．

f us fail to learn that pain is the body’s wayof informing the mind ______ we are doing something wrong, but not necessarily______ is wrong.

下列交际用语使用得体的一项是