Is Jack on duty today? — It _____be him. It’s his turn tomorrow. [ ]

In China, _____ number of high school students choose to go to _____ college in Beijing, because there they have more and better chances to find a good job in the future.

It’s _____ to rain.——Let’s get the work _____ before the raincomes.

ave me so much help, without ____ I couldn’thave succeeded last year

rehard to get and, _______, more young people are continuing their education