Sally was late for school because her clock didn't ring loudly．（ ）
| A． |
get off |
B． |
go off |
C． |
put off |
D． |
turn off |
On my______ birthday， my aunt gave me a nice dress as a present．（ ）
| A． |
nine |
B． |
ninth |
C． |
the ninth |
﹣ Who is the_______ runner， Mike or Sam？
﹣Mike is． He is good at running．（ ）
| A． |
faster |
B． |
slower |
C． |
weaker |
Work hard，______ you will get good grades．（ ）
| A． |
or |
B． |
but |
C． |
and |
Many more people have realized saving______ earth begins with small things．（ ）
| A． |
a |
B． |
an |
C． |
the |
Look! Miss Wang is carrying a heavy box． Let's go to help ．