19. After discussion, we all think it’s an idea that’s worth _____.
| A．considering | B．to consider | C．to be considered | D．of considering |
Progress so far has been very good. ______, we are sure that the project will be completed on time.
| A．However | B．Otherwise | C．Therefore | D．Besides |
Eugene’s never willing to alter any of his opinions. It’s no use ______ with him.
| A．to argue | B．arguing | C．argued | D．having argued |
I regret ______ that we have no news for you.
| A．to say | B．saying | C．to have said | D．having said |
When he saw a little boy ______ in the river, he took off his shirt and jumped into the water.
| A．struggles | B．struggling | C．to struggle | D．struggle |
—What do you think of the book?
—Oh, excellent. It’ s worth ______ a second time.
| A．to read | B．to be read | C．reading | D．being read |