---How long has your brother been working here?
---_______ he graduated from college in 2007.
| A．When | B．Until | C．Long before | D．Ever since |
Almost everyone has his own strengths and weaknesses. It is ________ others are weak that maybe you have a great advantage.
| A．as | B．where | C．that | D．what |
—I saw Dave in the lift this morning.
—Really? He _______ around here for a long time.
| A．won’t be seen | B．wasn't seen | C．hasn't been seen | D．hadn’t been seen |
Don’t you think it essential that every resident of Nanjing __________ spare no effort to make contributions to Nanjing 2014 Youth Olympic Games?
| A．should | B．will | C．shall | D．would |
—Jim managed to get into his house without the key．_______？
—I don't know. He might have asked someone for help．
| A．What for | B．So what | C．Guess how | D．Who knows |
If the coach had to choose between the two, he would say Lisa was ______.
| A．good | B．the best | C．better | D．the better |