-----What has made him upset recently?

-----_______ alone to face a troublesome milk case.

1. A.
   Left
2. B.
   Being left
3. C.
   Having left
4. D.
   To leave

---What has made him upset recently?
---______alone to face a troublesome milk case.

1. A.
   Left
2. B.
   Being left
3. C.
   Having left
4. D.
   To leave

—What has made him upset recently?

—____alone to face a troublesome milk case.

A. Left            B. Being left         C. Having left         D. To leave

--- What has made him upset recently?

   --- __________ alone to face a troublesome milk case.

      A．Left          B．Being left            C．Having left   D．To leave

--- What has made him upset recently?

--- __________ alone to face a troublesome milk case.

A．Left        B．Being left          C．Having left           D．To leave