Is there anybody who can lend me a hand？
I'm afraid not．You know，you're supposed to depend on ______．（ ）
A．myselfB．yourselfC．themselves
Look!Someone _______ the classroom．
Well，it wasn't me．I didn't do it．（ ）
| A． |
is cleaning |
B． |
was cleaning |
| C． |
has cleaned |
D． |
will clean |
Did you pass the test？
Yes．I'm very _____ for your advice．（ ）
| A． |
thankful |
B． |
careful |
C． |
useful |
D． |
helpful |
You can't smoke here．
Sorry，I ______ the sign．（ ）
| A． |
don't see |
B． |
didn't see |
| C． |
haven't seen |
D． |
won't see |
He is not old enough ________ to school．（ ）
| A． |
gone |
B． |
going |
C． |
went |
D． |
to go |
Can I go swimming，Mom？
Certainly．But you ____ be back by four．（ ）
| A． |
can |
B． |
may |
C． |
might |
D． |
must |