If we have illegal immigrants _________ in，many local workers will lose their jobs．
| A．came | B．coming |
| C．to come | D．having come |
I ______ her, but I never could.
| A．ought to help | B．must help |
| C．must have helped | D．ought to have helped |
He ______ at once when I promised to help him.
| A．cheered up | B．gave up | C．lighted up | D．turned up |
We usually take turns ______cleaning ,and today it is my turn ____it
| A．to do; doing | B．doing; doing | C．doing ;to do | D．to do ;to do |
I am looking forward to ______ your answer as soon as possible.
| A．receiving | B．being received | C．receive | D．be received |
.Nothing will _____ us ____going if we want to go.
| A．prevent…from | B．stop…from | C．keep…from | D．AB&C |