1 . ______ I agree with you, I don’t think your solution is the best.

A．If

B．Since

C．While

D．As

2 . ________in everyday life consumers have seen lots of successful examples of advertisements like Kodak, Nike, Coca-Cola, and McDonald’s, there are still some examples that do not reach the expected goal.

A．As

B．Because

C．In addition

D．While

3 . You’ll never speak English well________you often practice it.

A．unless

B．if

C．or

D．otherwise

4 . ______I am at home, my mother keeps pressing me to study all the time.

A．Because

B．When

C．Though

D．Until

5 . ________ everyone has left the party, we need to start cleaning.

A．Before

B．Whenever

C．Now that

D．In case