根据句意及汉语提示完成句子，每空一词。

1. I think it's very important ______  ______  ______ (与……交流) foreigners at the moment.

2. English is spoken ______  ______  ______  ______(作为第二语言) in some countries.

3. The cake was ______  ______ (把……分成……) three pieces by her.

4. ______(不论何时) you need help, send me an e-mail or telephone me.

5. The official goes to New York to take part in an ______  ______ (国际会议) every year.