Nobody knew who was the first ________ at school that morning when the window was broken.
| A．arriving | B．arrived | C．to arrive | D．have arrived |
Mrs.King often________homeless people_______food and clothes.she is very kind-hearted.
A.provides, for B.provides, with C.provides, to
The government is doing__________to protect the environment.
A.useful something
B.something useful
C.anything. useful
—How do you like this passage?
—There are so many new words in it that we can__________understand.
A.really B.nearly C.hardly
—Have you cleaned the room yet？
—Yes，I _______it an hour ago.
A.clean B.has cleand C.cleaned
Which of the following signs means “Throw litter here.”？
A. 
B.
C.