Many a young scientist（　）engaged in the research work.

A:have B:has C:have been D:has been

The famous writer is engaged in writing a novel.

Many a young scientist ______ engaged in the research work.

A:have B:has C:have been D:has been

What can you do if the international line is engaged

A:Book a call. B:Make a "person-to-person" call. C:Call back outside office hours. D:Keep on calling.

What can you do if the international line is engaged

A:Book a call. B:Make a "person-to-person" call. C:Call back outside office hours. D:Keep on calling.

We are {{U}}engaged{{/U}} in the interdisciplinary field of the science and technology of materials.

A:take up B:busy with C:interested in D:take in