I don’t know if she __________ tomorrow.—— If she _________ tomorrow, I’ll call you.

What will the weather be like tomorrow? — It ______ be rainy, cloudy or sunny. Who knows?

It is______ a sharp knife ______I can use it to cut open a hard pumpkin.[ ]

I could hardly understand ______ in class, so I raised my hand to ask.

My mother will have a_________holiday next month. She’ll take me to Beijing.