下列各组字母中全部是元音字母的是 ____。
| A．a, e, o, r | B．a, i, u, e |
| C．o, u, e, n | D．b, e, c, t |
—Can you guess _______ ?
— I've no idea about it.
A. why was he late
B. when shall we have the sports meeting
C. how much he paid for the camera
Take the advice ________ is given by Dr. White.
A. who B. which C. whose
—Why are you standing here, Mrs. White?
—I'm waiting for my son. He _________ back from school.
A. hasn't come B. won't come C. doesn't come
—We'd better not read ________ the sun.
—I agree. It's bad for our eyes.
A. in B. with C. under
— Is that girl in red Sally?
—No, it _________ her. She has gone to Hong Kong.
A. may be B. must be C. can't be