1、 Many lessons are now available online, from ______ students can choose for free.

2、 If you look at all sides of the situation, you'll find probably a solution that _______ everyone.

3、 They decide to have more workers for the project ______ it won't be delayed.

4、 下列区间中，函数f(x)=7sin(x-π/6)单调递增的区间是

5、（填空题） 填空题