我们明天将不得不面临这些困难。
We ______ ______ ______ ______ this difficulties tomorrow.

单项选择题As we can see from the passage there are ______ kinds of nonverbal communication signals.

问答题不懂装懂的人总有一天会受到惩罚的。

问答题学生们每天问那位老师很多问题。

单项选择题What affects the amount of carbon-14 on earth

单项选择题According to this passage, the best way to build a good vocabulary is ______.