--- Who’s singing in the bathroom?
--- It ________ be Mr. Brown. Nobody sings like that except him.
| A．will | B．must |
| C．could | D．should |
My son lives a little far from his office， so he always goes go work bus．（ ）
| A． |
on |
B． |
by |
C． |
with |
D． |
in |
I have difficulty working out the problem by myself．Could you help me？
_____________．（ ）
| A． |
It's my pleasure |
| B． |
With pleasure |
| C． |
No，l couldn't |
The child is crying．Please do something to make him_____．（ ）
| A． |
stop to cry |
| B． |
stop crying |
| C． |
to stop crying |
I don't know when he back．Please tell me when he back．（ ）
| A． |
comes，comes |
| B． |
comes，will come |
| C． |
will come，comes |
Two months ____ a long time．We can visit our grandparents during the vacation．（ ）
| A． |
am |
B． |
is |
C． |
are |