you had better drop your parents a ________ in case (以防)they are worrying about you.
| A．message | B．news | C．letters | D．line |
My chest _______ when I make a deep breath, doctor.
| A．harms | B．hurts | C．wounds | D．injures |
--- How can I use iPhone 4s?
--- Just refer to the _________.
| A．explanations | B．expressions | C．directions | D．Preparations |
What I need is book that contains ABC of oil painting.
| A．a; 不填 | B．the; 不填 | C．the; an | D．a; the |
It is not who is right but what is rightis of importance.
| A．which | B．it | C．that | D．this |
—Have you got any idea for the summer vacation?
—I don’t mind where we go______there’s sun, sea and beach.
| A．as long as | B．as if | C．now that | D．in order that |