Whether it will do us harm remains_______ .
| A．seen | B．seeing | C．being seen | D．to be seen |
When effectively _______, the feedback we share with students or employees can develop their awareness of their own learning.
| A．managing | B．being managed |
| C．managed | D．to manage |
We all can feel something unusual about Kate, but she just _________ let us know what it is.
| A．shouldn’t | B．mustn’t |
| C．needn’t | D．won’t |
I can’t imagine what air we would be breathing in if we __________ anything to stop air pollution.
| A．hadn’t done | B．didn’t do |
| C．haven’t done | D．don’t do |
Experts suggest that parents should let their child do tasks that he is physically and mentally capable of doing by himself, ______ will help to build a self-confident kid.
| A．that | B．who | C．which | D．what |
It’s recommended that our plan _____ until it was tested again.
| A．put off | B．be put off |
| C．should put off | D．would be put off |