(2013·陕西，13)Let those in need ________ that we will go all out to help them.

The boy’s father insisted that the boy ______ badly and that he ______ to the nearest hospital at once.

The twin brothers stand under the tree, ______ and say nothing.

A lot of questions _________ at the meeting, which made things more complicated(复杂的).

Changing the design of a new product may ____ the risk of its production in the market．