As a recent survey states, people can hardly enjoy a clear blue sky because of the high level of PM 2.5.
| A．in trouble | B．on purpose | C．as usual | D．in ruins |
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 |
The boy that his cock an egg yesterday.
| A．lied, lay | B．lied; laid | C．lay; lied | D．laid; lain |