_____has happened many times, children may get drowned in this river.
| A．As | B．Which | C．What | D．That |
. Tom kept quiet about the accident _______ lose his job.
| A．so as not to | B．so not as to | C．so as to not | D．not so as to |
. I felt it an honor _______ to speak here.
| A．to ask | B．asking | C．to be asked | D．having asked |
. ---I’d like to buy an expensive camera.
---Well, we have several models _______ .
| A．to choose from | B．to choose | C．to be chosen | D．for choice |
. _______ to the left and you’ll see the post office.
| A．To turn | B．Turning | C．Turned | D．Turn |
. Will you be able to attend the lecturenext week?
| A．giving | B．given | C．to be given | D．being given |