You can ________ us in the discussion if you________.

[　　]

—When can I come for the photos? I need them this afternoon.

—They should be ready by 12 noon. You can ________ us, madam.

1. A.
   wait on
2. B.
   call on
3. C.
   watch on
4. D.
   depend on

You can ________ us in the discussion if you ________．

1. A.
   take part in; hope so
2. B.
   join in; want to join
3. C.
   attend; want to
4. D.
   join; wish to

You can ________ us in the discussion if you ________.

[　　]

A．join; wish to

B．join in; want to join

C．take part in; hope so

D．attend; don't want

 You can ___ us in the discussion if you want to.

  A. join        B. join in         C. attend        D. take part in