I'm not sure________ he________ there with me.

1. A.
   if，goes
2. B.
   if，went
3. C.
   if，will go
4. D.
   if，go

I'm not sure if I'm going to Tim's party; I may go to the concert ________.

1. A.
   only
2. B.
   instead
3. C.
   early
4. D.
   late

I'm not sure about the meaning of the word. You'd better look it up in a ____ ．

A．letter               B．dictionary       C．postcard             D．notice