The scientist said videophone could be used ___ the conferences.
| A．into | B．at | C．for | D．to |
She had just finished her homework her mother asked her to practice playing the piano yesterday.
| A．when | B．while | C．after | D．since |
Home milk delivery has almost disappeared in China now, and gone with____are milkmen.
| A．which | B．it | C．what | D．them |
Sales director is a position ______communication ability is just as important as sales skills.
| A．which | B．that | C．when | D．where |
—The weather here in summer is so changeable. Please take an umbrella when you go out.
—________.
| A．Well, don’t worry | B．Well, it just depends | C．Oh, take it easy | D．OK, just in case |
Our teacher looked here and there on the playground ________looking for something.
| A．even though | B．as if | C．even if | D．only if |