Though they had a meeting yesterday, there is still much that remains______.
| A．to solve | B．to be solved | C．solving | D．solved |
He hurried out and ______the chair.
| A．knocked up | B．knocked off | C．knocked back | D．knocked over |
There were signs here and there, _____ visitors to look out for ______ rocks.
| A．warning; fallen | B．warned; falling | C．to warn; fallen | D．warning; falling |
I don't doubt ______ he will pass the tomorrow’s exam.
| A．that | B．whether | C．if | D．which |
We were ______ on our way to the airport because of the heavy snow.
| A．held up | B．held out | C．held on | D．held with |
______ all the required papers, he didn’t answer the questions fluently in class.
| A．Having not read | B．Not having read | C．Not read | D．Not to read |