You will not be allowed to get into the plane_______ you pass security checks(安检).
| A．if | B．unless | C．or | D．because |
My friend and I aregood at biology. But we don't like geography very much.
| A．all | B．both | C．either | D．neither |
You will be able to meet the famous writer if youto the book store tomorrow.
| A．go | B．went | C．will go | D．are going |
World Water Day is on March 22 every year. Which of the following is the symbol of it?
-Is that a boy or a girl? .
, I think.
| A．Yes, it is | B．No, it isn't | C．That's nice | D．That's a girl |
-My son is studying for an important exam. Could you please the music a little? -I'm very sorry.
| A．give out | B．pick up | C．turn down | D．take off |