. Helen has picked up French and can speak fluently after a short stay with her aunt in Paris.
| A．捡起，拾起 | B．开车接某人 |
| C．接收，收听 | D．偶然学会 |
Just as sound travels through the air in waves, electricity travels through the air in ______ radio waves.
| A．what is called | B．which is called | C．what it is called | D．which it is called |
It was _____ of Jack to turn off the radio when I was sleeping in the bedroom.
| A．considerable | B．considerate | C．disturbing | D．sensible |
A student will be immediately dismissed if he/ she is found _____ in school.
I failed again in the exam and only then _____ how much time I had wasted.
| A．I realized | B．did I realize | C．I had realized | D．had I realized |
—Mom. May I play computer games just for a while?
—______ ! Dad is writing his paper.
| A．Help yourself | B．It’s up to you | C．Go ahead | D．Behave yourself |