The little girl was unhappy_________her picture-book broken.
A. at B. for C. because of D. with
．—Are my clothes too casual?
—No. You can go_________you are.
A．as B．what C．that D．where
Please turn down the music, _________our neighbors next door will be disturbed.
A．and B．or C．but D．so
In summer, food will go bad if_________in room temperature.
A．leaving B．left C．being left D．having left
．QQ, _________you can chat with your friends, makes communication easy.
A．why B．which C．that D．where
_________fit, we ought to learn more about our body and be careful with what we eat.
A．Keeping B．To keep C．Having kept. D．To have kept
