The house could fall down soon if no one ______ some quick repair work

I don’t know what to do. Can you give us__________

Mr Wan was ________ to his son’s graduating ceremony, and he was asked to deliver a speech in the presence of all the graduates

There were _____ many people in the zoo _____ it was hard to get through the crowd tosee the animals [ ]

It’s time you _______ some reading or the other students will leave you behind.