Tom raised his hands    to say something, but he remained silent in the end.

Robert failed to complete his education____ he found it hard to focus on his studies.

_____ I accept the gift or refuse it is none of your business.

__________I don’t like the film, the leading actor’s performance gave me a deep impression.

I think everyone should donate blood _____ he is healthy because that’s a citizen’s responsibility.

The value of life lies not in        many days we live, but in ____ use we make of them.

As long as I can remember, _______ I called, my son would answer.

I lost sight of Wang Ping when we reached _________ looked like a large market.

—I'll call you ______ I arrive in Shenzhen．
—Thanks, and good luck．

—I'll call you ______ I arrive in Shenzhen．
—Thanks, and good luck．