Is there any flight to Tokyo today ?—I think there __, for the weather is too bad.

________carefully if any change occurs when doing experiments in the lab.

What is the most popular way to communicate in China now–WeChat. One of its ____ is that it can send words, pictures as well as voices.

We all went to see the film_____ Tom. What a pity it is for him to miss it!

I _____ through the hard time but for my teacher’s generous and timely help.