I can't see Lucy because she is _______ the tree．（ ）
| A． |
in front of |
| B． |
behind |
| C． |
next to |
Everyone can help in ______ way or another to make our city more beautiful．（ ）
| A． |
any |
B． |
one |
C． |
every |
D． |
either |
Has your daughter come back from Australia？
Yes． She ______ there for three years（ ）
| A． |
has stayed |
B． |
stays |
C． |
stayed |
D． |
had stayed |
I know what you are thinking about． I can ______ your mind from the look on your face．（ ）
| A． |
stay |
B． |
spare |
C． |
read |
D． |
attend |
Air pollution will remain a problem for a long time， ______ we have done a lot to solve it．（ ）
| A． |
though |
B． |
since |
C． |
unless |
D． |
if |
He was once ______ killed in a car accident several years ago．（ ）
| A． |
completely |
B． |
sadly |
C． |
exactly |
D． |
nearly |