Puzzled by this strange natural phenomenon, the scientists started to explore every _______ they knew to figure it out.
| A．impression | B．intention | C．avenue | D．design |
. ―Thanks for the ride home!
―_______
| A．Don’t mention it. | B．With pleasure. |
| C．Never mind about that. | D．That’s right. |
The expo is being held in Shanghai, _______a lot of advanced technology is shown for the first time.
| A．why | B．which | C．when | D．where |
._______, he went into the tea-house and seated himself at a little table by the window.
| A．Thirsty and tiredly | B．Thirsty and tired | C．Thirstily and tiredly | D．Thirstily and tired |
It is only when an NBA player has been through many battles _______he learns an important lesson: there is no "I" in "team".
| A．after | B．before | C．what | D．that |
. ________ others whenever you can and you will make
the world a nicer place to live in.
| A．Help | B．Helped | C．To help | D．Helping |