Throwing their hats into the air, the fans of the winning team _____ loud shouts of victory.

下列各句中，有语病的一句是（ ）

Doctors say we need more fruit and vegetables to be ________ because _______ is very important.

Once a decision has been made, all of us shouldit .

The number of people invited ______ fifty, but a number of them ________ absent for different reasons.