He always has great trouble (understand) ___ what the teacher says in class.
A1 Gore works for a clean energy company.
Electronic goods such as laser prints and computers all contribute to_____
Courtroom interpreters are under great pressure and have to be_______
The possibility of government action to reduce emissions has led to greater investment in green technologies.
You can save a lot of time and avoid misunderstandings if you communicate clearly and ________.